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Mad Mattr Master Building Set by Relevant Play


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Fulfilled by our friends at Relevant Play

MAD MATTR Master Building Set - Stretch your creativity to the max….with Mad Mattr – the amazing, super-soft modelling compound that molds and builds incredibly easily. Mad Mattr is stretchy, flowy and incredibly tactile - press it, mold it, knead it, stretch it, squeeze it, squish it, sculpt it, shape it, build it! Stretch it slow and watch it flow. Mad Mattr is the super soft modelling compound, that molds and shapes easily; and when used with The Ultimate Brick Maker it allows you to build connecting, stackable bricks! Because it doesn’t dry out and maintains its shape when compacted, Mad Mattr is perfect for building amazing creations and inspiring open-ended play! Quickly make your masterpieces come to life by creating the all in one six (6) awesome brick maker included. This set also includes a set of colorful Mini Extruders that gives minds of all ages a fun and creative way to learn about geometric shapes. Six (6) Mini Extruder shapes to choose from - Triangle, Hexagon, Cube, Star, Circle, House – you can stack, shape, stretch, and build endless, colorful 3D shapes.


  • Build it, stretch it, watch it flow!

  • Molds and shapes easily!

  • Super duper soft!

  • Reusable! Never dries out!

  • Easy to Clean Up

  • Wheat, Gluten and Casein-Free

  • Comes in a re-sealable storage pouch.

  • Available in 10 colors.

  • Quickly make six (6) awesome bricks at once or just one (1)!

  • Creative ways to learn about geometric shapes.

Age Grade



  • 1 - 10oz Pack (1-Blue)

  • 1 - Ultimate Brick Maker

  • 1 - X6 Ultimate Brick Maker

  • 6 - Shape extruders

WARNING: Choking Hazard. Small Parts. Not for children under 5 years.