Kids of all ages can imagine and build limitless creations with Mad Mattr®, the unbelievable dough you build with. The Master Builder Mini Extruder Set is a great way to develop early geometry skills while stretching the imagination. The pack includes six (6) Mini Extruders, two (2) 5 oz. pouches of Mad Mattr unbelievable building dough. This futuristic dough can be mixed together to create and build even more Mad Mattr fun. Its unique, non-toxic formula is gluten, casein, and wheat free.