Mystery Sticker Blind Bag
Three little surprises to collect, swap or stick somewhere special—like treasures from your childhood.
1 big + 2 small stickers · Random picks from 8 designs.
Collector checklist printed on the back of the bag.
57 Mail ClubHappy mail, made by kidsHalloween pop-up · 31 October–7 November 2026
A little Halloween,
for your
memory box.
Stickers, little notes and hand-drawn surprises from the kids at 57 Club. For children, and every grown-up who still loves opening something fun in the post.
Started by our 7-year-old Little Boss, with grown-up help. Meet 57 Club
Orders open 31 October–7 November.
School days, play days, post days. 💌
We’ve got school to go to and games to play, so our little mail adventure happens in small batches!
This time, orders are open 31 October–7 November. After that, we’ll pack your surprises, get the envelopes ready and take them to the post office together with our grown-ups. We’re learning how our little creations travel from our hands to your letterbox!
Thanks for being part of our first mail adventure.
US$7 · One-time purchase
International postage included
A peek inside. Sticker designs are a surprise.
Five little things. One happy envelope.
Open it. Make it yours. Keep it.
Halloween drawings by little bro. A letter from Swen.
And a little space for your own memories, too.
A6 Mini Art Print
Halloween through little bro’s eyes—a little keepsake for your wall, journal or memory box.
A6 Colouring Card
Pick up your coloured pencils, slow down and colour a little memory of this season.
230gsm card · Enjoy with coloured pencils.
A6 Story Keeper Card
Save a feeling, a little adventure or an ordinary day you’d love to remember.
A Letter from Our Little Boss
Little thoughts and big daydreams from Swen’s whimsical world—a letter to unfold and keep.
Little things to collect.
Ordinary moments to keep.
A season to remember.
Ordinary moments to keep.
A season to remember.
Meet 57 Club
Mail from kids,
for the kid
in everyone.
57 Club began with our 7-year-old Little Boss’s idea to start her own creative business. The ideas and hand-drawn artwork come from the children. We grown-ups help bring them to life.
Our first envelope started with Little Bro’s school Halloween celebration. We made stickers for his classmates’ goodie bags, and Little Boss wanted to share the mystery sticker blind bag fun with everyone.
So here comes Halloween in an Envelope: a little mail from our kids to yours, and to every grown-up with a soft spot for stickers and surprises.
Take a peek inside the envelopeA little note for later
We’ll tell you
what’s next.
Not ready for this envelope? Leave your email and we’ll let you know when there’s something new from 57 Mail Club.
Orders for this batch close on 7 November. A second batch isn’t confirmed.
Joining is free. It doesn’t place an order or reserve the extra pack.
The envelope is US$7, including international postage. It’s a one-time purchase, with no monthly subscription.
See you in the post!
With love, 57 Mail Club
With love, 57 Mail Club
Why is the shop only open for a little while?
School days, play days, post days! We’ve got school to go to and games to play, so our little mail adventure happens in small batches.
For this batch, orders are open 31 October–7 November. After that, we’ll pack your surprises and take the envelopes to the post office together with our grown-ups. We’re learning how our creations travel from our hands to your letterbox!
Thanks for being part of our first mail adventure.
Is this a monthly subscription?
No. This Halloween pop-up is a one-time purchase for US$7, including international postage.
Does joining the email list reserve the extra pack?
No. The extra mystery sticker pack goes to the first 25 completed purchases.
When will my envelope be sent?
We’ll collect orders from 31 October to 7 November, then prepare and post the envelopes after the order window closes. Your envelope won’t be dispatched as soon as you order.
What if my envelope gets lost or arrives damaged?
We’re sorry if that happens. Write to us through our contact page and we’ll send you a replacement.
Will there be a second batch?
This opening is for our first Halloween batch. A second batch hasn’t been confirmed.