Giant Building Blocks for Epic Indoor Adventures

Finally, a way to let them "get the energy out" on rainy days—without the noise. Made from premium soft foam, RIWI blocks turn any room into a safe zone for giant builds and endless creativity.

Stop the screen time. Start the adventure. ✨

Cartoon bear with a speech bubble stating 'RIWI has already made over 85,000 families happy.' RIWI buildit

MORE MOVEMENT. MORE IMAGINATION. MORE RIWI.

Play that inspires — with space for your own ideas.

Colorful RIWI buildit toy structure with a bear figure on top, surrounded by flames.

Epic Adventures Await!

Explore the Creative World of RIWI

Washable Washable
Indoor Fun Indoor Fun
Creativity Creativity
Adventure Adventure
Family Time Family Time
Ultra Strong Ultra Strong

Why US Parents Choose RIWI:

  • Play-Ready in 2 Hours: Forget the 3-day expansion wait common with other foam brands. Our ActiveCore™ technology ensures your set is ready for building by naptime. (Blocks expand to full strength within minutes - in some cases to a maximum of 24 hours after unboxing)
  • Deep-Clean Hygiene: While most play couches only have washable covers, RIWI foam is 100% machine-washable. Keep your playroom fresh and allergen-free, even after juice spills or wild adventures.
  • Premium European Engineering: In a market flooded with cheap imports, RIWI is engineered in Austria and made in the EU. 100% toxin-free, ASTM & CPSIA certified for your ultimate peace of mind. 
  • The Indoor "Energy Burner": The perfect tool for gross motor skill development. Let them climb, jump, and crash safely on rainy days without the noise or the broken furniture.
  • 24-in-1 Play Couch Utility: Stop the playroom clutter. When play ends, our Couch Cover system allows 24 blocks to "disappear" into a functional, stylish sofa for your living space.
  • Built for "Inspiring Inventors": A high-impact STEM investment that grows with your child. Foster architectural confidence and independent, screen-free play from ages 3 to 12.

Building blocks kids love

All reviews

Our three children are always coming up with new ideas and love to just throw themselves into their work at the end to destroy everything. Even our youngest (1.5 years) can build her first structures because the blocks are so light.

— Benjamin

Great building blocks! What I particularly love: they are washable. If you lay them out flat to dry, they regain their shape perfectly. We have the 48-piece set and build huge caves where several children can fit inside.

— Family H.

We could throw out every other toy we own and my kids would still be happy because all they want to do is play with their RIWIs! It promotes imagination enormously—everything from caves to entire castles is possible.

— Lauren M.

By far the best investment for indoor play. These blocks are functional, well-made, and allow kids to tumble and climb safely without any hard edges. Finally, a solution that keeps them active and safe at the same time!

— Mary H.

Radiant children's eyes and huge building fun! The material is soft, light, and grippy—perfect for stacking. A highlight is letting a tower fall over together and landing softly in a mountain of blocks. Odorless and high quality!

— Philipp

Just purchased my second set. There are many companies out there—but buy the original. The quality, versatility, and the fact that it still looks great in our living room makes it worth every penny. Absolute recommendation!

— Tamara H.

Our three children are always coming up with new ideas and love to just throw themselves into their work at the end to destroy everything. Even our youngest (1.5 years) can build her first structures because the blocks are so light.

— Benjamin

Great building blocks! What I particularly love: they are washable. If you lay them out flat to dry, they regain their shape perfectly. We have the 48-piece set and build huge caves where several children can fit inside.

— Family H.

We could throw out every other toy we own and my kids would still be happy because all they want to do is play with their RIWIs! It promotes imagination enormously—everything from caves to entire castles is possible.

— Lauren M.

RIWI in action

By far the best investment for indoor play. These blocks are functional, well-made, and allow kids to tumble and climb safely without any hard edges. Finally, a solution that keeps them active and safe at the same time!

— Mary H.

Radiant children's eyes and huge building fun! The material is soft, light, and grippy—perfect for stacking. A highlight is letting a tower fall over together and landing softly in a mountain of blocks. Odorless and high quality!

— Philipp

Just purchased my second set. There are many companies out there—but buy the original. The quality, versatility, and the fact that it still looks great in our living room makes it worth every penny. Absolute recommendation!

— Tamara H.

All reviews