Mad Mattr's Quantum Builder Pack lets you press-mold stackable bricks! Build them up and smoosh them back down as much as you want! Comes with enough dough to make over fifty bricks. Mad Mattr is the unbelievable dough that stretches, molds, never dries out, and never stains! Mad Mattr is non-toxic and even gluten and casein free, though please do not eat it. Contains 10 ounces of mad matter and an Ultimate Brick Maker. Comes in red, teal and blue colors. Made in Sweden. Ages 3 and up. Choking hazard, keep away from children under 3 years.