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Activity Play Mattress Set - Deep Green
$369.00 USD
Shipping calculated at checkout.
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Monboxy: The Ultimate Multi-Purpose Sofa for Kids
Transform your child's playtime with the versatile Monboxy Multi-Purpose Sofa. Whether used as a cozy couch, imaginative play gym, playful sleepover mattress, or an adventurous play tent, Monboxy is the ultimate Montessori gift for children aged 1 to 16 years. Delight in its safe, rounded design that offers peace of mind while encouraging screen-free play and imaginative adventures.
Unmatched Versatility & Safety
- Safe Design: No sharp corners, ensuring safe and fun playtime.
- Imaginative Play: Countless ways to engage, from building forts to cozy lounging, fostering creativity and learning.
Included in the Set
- Base Mattress: Thicker foam with removable, washable covers. Compact storage. Size: 170 x 85 x 15 cm.
- Flexible Mattress: Thinner design, flexible for creative play. Removable cover. Size: 170 x 85 x 8 cm.
- Trapezoidal Pillows: Perfect for creative shapes. Removable, washable covers. Size: 56 x 56 x 31 cm.
Benefits for Your Child's Development
- Enhances gross motor skills and spatial awareness
- Promotes open-ended and independent play
- Improves problem-solving abilities and curiosity
Premium Materials & Easy Care
- Fabric: 100% polyester, OEKO-TEX® STANDARD 100 certified, ensuring no harmful substances.
- Foam: Flexible polyether polyurethane, also OEKO-TEX® certified.
- Convenient Care: Easy to fold and store with washable covers for effortless cleanup.
Shipping Information
Please note the special shipping rates for Monboxy:
- 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€
Give the gift of imagination and development with the Monboxy Multi-Purpose Sofa. Order now to inspire endless adventures and creativity in your child's life.
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
We’re proud to support Sutton Night Watch, a grassroots UK charity making a real difference in the lives of those facing homelessness. Through regular donations of stock, supplies, and essentials, we back their mission to offer warmth, dignity, and practical help to anyone in need — right where it matters most.
Sell with us
Sostter partners with independent brands that intrigue, inspire, and bring something genuinely different to the world of fashion, design, and living. Join us!