4M Diving Submarine Watch the wonder of chemistry at work as this baking powder powered diving submarine submerges before your eyes just like the real thing. Simply fill the submarine with baking powder, place it in water, and observe as it submerges and re-surfaces over and over again. An excellent stocking stuffer, this toy is a great way to show how chemical reactions occur in a classroom setting. Give the gift of science with toys and gadgets that foster curiosity and encourage scientific learning. Recommended for ages 5 and up. Challenge your child's imagination with 4M toys and kits. 4M educational toys cover a wide range of educational subjects and include science kits, arts and crafts kits, robotics kits, and more. 4M offers a wide range of toys and kits to let you build a clock, crochet a placemat, or turn your room into a planetarium--all in the name of making learning fun. Diving submarine powered by baking powder Fun way to experiment with chemical reactions For home or classroom use Baking powder not included For ages 5 and up