
Activity Play Mattress Set - Coral
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Discover Endless Possibilities with the Monboxy Play Sofa
Unleash a world of creativity and fun with the Monboxy Play Sofa. Designed as the ultimate Montessori gift, this versatile set adapts to every aspect of your child's life. Whether used as a cozy sofa, an indoor gym, a play tent, or even a sleepover bed, Monboxy is perfect for birthdays, Christmas, or just because. Ideal for children aged 1 to 16, its endless configurations foster imagination and outdoor-like play indoors, all while keeping kids away from screens.
Features & Benefits:
- Child-Friendly Design: Crafted with no sharp edges, allowing kids to engage safely and parents to relax with peace of mind.
- Developmental Benefits: Enhances gross motor skills, supports open-ended play, boosts problem-solving, nurtures independent play, and sparks curiosity.
- Compact and Convenient: Easily foldable for minimal storage, making it perfect for any space.
What's Included:
- Base Mattress: Durable yet soft, with a removable, washable cover. Size: 170 x 85 x 15 cm.
- Flexible Mattress: Bendable and versatile, also with a removable cover. Size: 170 x 85 x 8 cm.
- Trapezoidal Pillows: Two uniquely shaped pillows for creative play. Size: 56 x 56 x 31 cm.
Quality Materials:
- Fabric: Made from OEKO-TEX® STANDARD 100 certified 100% polyester, ensuring safety and comfort.
- Foam: Constructed with flexible polyether polyurethane foam, certified to meet ecological safety standards.
Shipping Information:
- Estonia, Latvia, Germany, Sweden, Denmark, Poland, Slovakia, Hungary: 24.99€
- Lithuania, Spain, The Netherlands, Belgium, Ireland, UK, Luxembourg, Slovenia, Czech Republic, Austria, Italy, France: 29.99€
- Finland, Bulgaria, Croatia, Greece, Portugal, Romania: 49.99€
Transform your child's playtime with a Monboxy Play Sofa, crafted for fun and learning. Order now to elevate their physical and imaginative adventures at home.
SHIPPING + RETURNS
THE RATHER IMPORTANT BITS
This rather lovely piece ships directly from our brand partner - we work with independent brands who are absolutely brilliant and work frightfully hard to create beautiful things.
SHIPPING DESTINATIONS
Now, here's the thing - our wonderful brand partners ship to lots of different places, but not all of them can ship worldwide.
Some are brilliant at international shipping, others prefer to keep things closer to home.
At checkout, you'll see exactly where this particular brand can send your goodies.
We're terribly sorry, but shipping costs do vary rather wildly depending on where you are in the world. The exact figures pop up at checkout - no nasty surprises!
RETURNS
You have 14 days to return items.
Now, we absolutely adore our brand partners - they work incredibly hard and we do try to support them as much as we possibly can. So I'm rather afraid we have to pass the return postage costs back to you. Frightfully sorry about that!
🌍 PLEASE CHOOSE THOUGHTFULLY:
Our wonderful partners put their hearts into everything they make.
Ordering multiple sizes to try at home is rather hard on our planet and makes things jolly difficult for these brilliant independent creators.
When in doubt, do ask us first!
The brands we work with all have a chat option, and they love to chat!
PAYMENT
We're frightfully modern and accept all the usual suspects:
Visa, Mastercard, American Express, PayPal, Apple Pay, Google Pay, and Shop Pay
SECURE AS HOUSES
Everything's properly encrypted and secure - your details are safer than the Crown Jewels!
All prices in lovely British pounds £ GBP, though international chaps will see converted prices.
Any payment pickle? We're here to help sort things out! Contact us

We are Sostter
We met as children. Grew up a few streets apart. Built dens, rode bikes, and eventually — built Sostter.
It started with a shared love of objects that meant something…things with a past, or at least a purpose.
Now, Sostter is our grown-up version of a treasure hunt: a space where design meets storytelling.
We curate independent brands, one-of-a-kind finds, and everyday essentials with character.
Giving Back
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