Zip's Mailbox Club › The Wonder Library
Published August 13, 2026 · Updated September 11, 2026
Ten kids’ letter subscriptions are compared below. They run from about $5 to $20 a month, and only one of them describes writing back to your child. Yes, we make one of these, so read this as a maker’s honest map of the field, not a neutral review site. Every price, age range and frequency below was checked against that company’s own website on August 30, 2026, and the newest entry, Everletter, on September 2, 2026 (always check theirs for current details). Where a competitor is the better fit for your child, we say so.
| Zip’s Mailbox Club | Sunny the Mail Snail | Activity boxes (e.g. Little Passports) | |
|---|---|---|---|
| What it is | Two-way personalized letters + a year-long mystery | Weekly letters from a snail character | Monthly hands-on activity kits |
| Price | $20/mo, or $200/yr | $58/3mo, $96/6mo, $188/12mo | Varies by line, see their site |
| Ages | 3–12, four reading tracks | Not printed on their site | 3–8+ by line |
| Mail frequency | 2×/month (24 mail moments/yr) | Weekly | 1×/month |
| Personalization | Name, age, interests, and their own replies shape the story | Addressed by name | Generally not personalized |
| Child writes back? | Yes. pre-stamped envelope included; Zip remembers what they write | Not part of the service | No |
| Story continuity | One connected season-long mystery | Ongoing character letters | Themed kits |
Zip includes a pre-stamped envelope in each mailing: one to reply to Zip, and one to write to a friend. Replies are optional.
Pick Sunny the Mail Snail if sheer mail-day frequency matters most: letters arrive weekly, which for a 3–6 year old who runs to the mailbox is a lot of joy per month. Personalization is name-level and the letters aren’t two-way, but the volume is unmatched. We put the two of us side by side in detail in Sunny the Mail Snail vs. Zip’s Mailbox Club.
Pick an activity box like Little Passports if your child is a builder rather than a reader, kits, experiments, and crafts instead of letters. (We wrote a whole guide on letters vs. boxes.)
Pick Zip’s Mailbox Club if you want the mail to be about your child and to talk back. Every letter is built from your child’s name, age, and interests; every package includes a pre-stamped envelope; and what your child writes back is remembered and woven into later letters, across one connected year-long mystery. That two-way memory is the thing we haven’t seen anywhere else, it’s why we built it.
We’re not the cheapest, $20/month is real money, and if your family just wants a nice story in the mailbox, several services on this page cost less. We send two mailings a month, not weekly, so Sunny beats us on raw frequency. What you’re paying us for is depth: personalization that goes past the envelope, a story that carries across the year, and a club that answers when your child writes back. If the first letter doesn’t land for your kid, we refund it.
Kids’ letter subscriptions cost roughly $5 to $20 a month in 2026, and almost none of them write back. The table below is every kids’ letter service we could find with a working store, read off that company’s own website on August 30, 2026, with Everletter added and read on September 2, 2026. Where a company does not publish a number, this table says not printed rather than guessing at one.
| Service | Price, as listed | Ages, as stated | How often | Does the child get a written reply? |
|---|---|---|---|---|
| Zip’s Mailbox Club | $20/mo, or $200/yr | 3–12 | 2 mailings a month | Yes. Every package includes a pre-stamped envelope, and what the child writes back is remembered in later letters |
| Sunny the Mail Snail | $58 / 3 months, $96 / 6 months, $188 / 12 months (about $19.33, $16.00 and $15.67 a month – that arithmetic is ours) | Not printed on their shop page | Weekly | No reply path described on their site |
| Little Letters Club (Growing Up Littles) | $11.00 | Not printed on that collection page | Monthly | No reply path described there |
| Everletter (Starpost Club) | $20/mo; $108 for 6 months; $204 for 12 months (about $18.00 and $17.00 a month on the longer terms, and that arithmetic is ours) | 6–12 | Two letters a month, stated as mailed on the 1st and 15th | No reply path described on their site, including their own questions page |
| The Adventure Letters | $12.99/mo, or $150 for the year | 8–13 | 2 letters a month, on the 2nd or 4th Friday | No reply path described on their site |
| Mailbox Kid | $12/mo (Simple Mail) or $24/mo | 4–17, in three levels | Monthly | Different model: the kit is for your child to write out – letter sheet, envelope and a real Forever stamp. Whether anyone answers is up to the person they mail |
| Pen Pals from the Past | $1 today, then $5/mo | Not stated; letters described as matched to the reader | 1 letter a month | Their site says the letter carries “a question or creative prompt that invites a reply”; it does not say on the homepage whether the pen pal answers |
| Writings from the Wild | Basic and Premium tiers with 6- and 12-month savings; no headline monthly price printed on the homepage | Not stated | Monthly | No reply path described on their site |
| Animail Adventures | Three tiers (Letter, Sticker, Pen Pal); no prices printed on the homepage | Not stated; described as for “kids and adults” | Monthly | The Pen Pal tier ships stationery and USPS stamps so your child can write out; no reply from the service is described |
| Snail Mail Stories | As of August 30, 2026 their domain no longer resolves to a store – it redirects to a domain-listing page. We could not verify that this service is still taking subscriptions, although older roundups still recommend it. Check with them directly. | |||
Read the last column again, because it is the whole point of this page. Nine of the ten either send mail one way or hand your child the supplies to write to somebody else. Zip’s Mailbox Club is the only one on this list whose own website describes a written reply coming back from the service – and more than a reply, a memory: your child’s answers show up inside a later letter. If a reply is what you actually want, that is the column to shop on, and you should ask any company here directly before you subscribe.
Two honest notes. First, we are on this list, so treat the last column as a claim you should test rather than a verdict from a referee. Second, “no reply path described” means exactly that – we read their site and did not find one. It does not mean a company refuses to write back if you ask.
Everletter and Zip’s Mailbox Club are the closest match in this category on price and on how often mail arrives, and they are built on two different ideas. Everletter sends a serialized story from a character your child picks. Zip’s Mailbox Club sends letters written to your child by name, and Zip writes back to what your child sends in. Here is what each company states on its own site.
Where they line up. Everletter lists $20 a month, with $108 for six months and $204 for twelve. Zip’s Mailbox Club is $20 a month or $200 for a prepaid year. Everletter states two mailed letters every month, on the 1st and the 15th; Zip’s Mailbox Club sends two personalized mail deliveries every month, which is 24 mail days a year. Both send paper, not a plastic kit, and both are built around a story that continues rather than a one-off card. On price and cadence, these two are within a rounding error of each other.
Where they part. Everletter states ages 6 to 12. Zip’s Mailbox Club is for ages 3 to 12, in reading bands, so a preschooler and a fourth grader in the same house can both be members. Everletter’s personalization is choosing a character, Oliver, Harper, Marley or Ringo, and following that character’s story. Zip’s personalization runs on your child: their name, their age, and the things they told us they love.
The real difference is the reply. We read Everletter’s kids page, subscription pages and their own questions page on September 2, 2026. That questions page works through fourteen questions, about what is inside the envelope, who writes the letters, switching characters, gifting, shipping and cancelling, and not one of them is about the child writing back. We found no reply card, no return address for the child, and no statement that a character answers. With Zip’s Mailbox Club, every package includes a pre-stamped envelope, and what your child writes back is remembered: their own words turn up inside a later letter from Zip.
So which one. If your child is 6 to 12 and what you want is a beautifully made adventure to read and collect, Everletter is a genuine choice and you should look at it. If you want the mail to be about your child specifically, if you have a child under 6, or if the point is that somebody answers when your child writes, that is the thing we built. Prices and details in this paragraph were read off Everletter’s own site on September 2, 2026, and they can change, so check theirs before you buy.
SUMMERWITHSUNNY for 15% off, stated as valid through August 31, so it will have run out for most people reading this.Anything dated here was true on the day we checked it. Prices in this category move, so click through to the company before you buy.
New to the category and not ready to compare services yet? Start with what to look for in a snail mail for kids subscription.
It depends on the child. For a two-way experience where the service remembers what your child writes back, Zip’s Mailbox Club ($20/month, ages 3–12) is built for that. For weekly mail volume, Sunny the Mail Snail sells prepaid terms of $58, $96 and $188, which works out to about $15.67 a month on the longest one, and sends letters every week.
About $5 to $20 a month, checked against each company’s own site on August 30, 2026. Pen Pals from the Past lists $1 today then $5 a month; Little Letters Club lists $11.00; Mailbox Kid is $12 or $24 a month; The Adventure Letters is $12.99 a month; Sunny the Mail Snail sells prepaid terms of $58, $96 and $188; and Zip’s Mailbox Club is $20 a month or $200 for a prepaid year.
Of the nine services checked on August 30, 2026, Zip’s Mailbox Club is the only one whose own website describes a written reply coming back from the service: every package includes a pre-stamped envelope, and what the child writes back is remembered and woven into later letters. Mailbox Kid and the Animail Adventures Pen Pal tier instead send stationery and stamps so your child can write out to someone else, which is a different thing. If a reply matters to you, ask the company directly before you subscribe.
Most arrive once a month. Sunny the Mail Snail is weekly; Zip’s Mailbox Club and The Adventure Letters each send two mailings a month. After price, frequency is the clearest difference between these services, so decide whether your family wants one bigger mail moment or several smaller ones.
We could not verify that it is. As of August 30, 2026 their domain returns a redirect to a domain-listing page rather than a store, so we cannot confirm the service is still taking subscriptions, even though several older roundups still recommend it. Check with the company directly before signing up.
No. They are the closest match in this category on price and on how often mail arrives, and they are built on two different ideas. Read off their own site on September 2, 2026, Everletter lists $20 a month, states ages 6 to 12, and mails two letters a month on the 1st and 15th. Zip’s Mailbox Club is $20 a month or $200 a year, covers ages 3 to 12, and sends two personalized mail deliveries every month. The difference is the reply. Everletter personalizes by letting your child pick a character to follow, and its own questions page works through fourteen questions without one of them being about writing back. Zip writes to your child by name about the things that child loves, every package carries a pre-stamped envelope, and what your child writes back is remembered and shows up in a later letter.
Three of the ten services on this page describe two mailings a month: Zip’s Mailbox Club, The Adventure Letters, and Everletter, which states that it mails on the 1st and 15th. Sunny the Mail Snail goes further and mails weekly. Everything else on the list arrives once a month. Two mail days a month is becoming the ordinary shape of this category, so frequency on its own no longer separates these services. Compare what actually arrives, and whether anything comes back.
See our pricing, how it works, or see what actually arrives in the envelope. And genuinely: their sites are a click away, sunnythemailsnail.com, littlepassports.com. Pick the one your kid will love.
Each month brings a letter from Zip and a second letter from that month's Mailbox Crew member. Your child's replies can shape a later letter, so the story remembers what they share. Behind the scenes, Zip's Mailbox Club was founded by Mack, a dad who writes, personalizes, and hand-packs the mail behind these guides. Read the founder story →
Personalized real mail for your child every month, a letter from Zip, a new Mailbox Crew friend, and a year-long mystery only your child can help solve.
Join the Mailbox Club →A collection of essays about childhood, curiosity, imagination, and slowing down.