Mad Mattr Master Builder Mini Extruder Tool Kit. Inspires hours of fun & creativity! Create fun 3D shapes & sculptures For use with Mad Mattr (sold separately) Includes 6 extruders and 1 sculpting knife 3.75"w x 2"l x 6"h 10 oz. net wt. For ages 3 and up Shaping creativity with the Mad Mattr Mini Extruder Tool Kit This set of six extruders (circle, square, star, triangle, house and hexagon) plus a handy sculpting knife offers hours of entertainment to kids of all ages. Use the Mad Mattr Non-Drying Play Dough (sold separately) to create cool, colorful 3D geometrical shapes and structures. Just fill each mini extruder, then push the plunger to create your shape. The possibilities are as limitless as your imagination! For ages 3 and up. Order your Mad Mattr Master Builder Mini Extruder Took Kit from Brookstone today! WARNING: CHOKING HAZARD-- small parts. Not for children under 3 years.