This Cartesian Diver game is guaranteed to get anyone hooked on science! The soda bottle houses two divers: one floats and has a hook, the other diver stays on the bottom and has a loop. Explore fun and science as you try to make the one diver sink by squeezing the soda bottle and catch the loop on the other. Also available as a classroom kit with enough materials to make 30 hook and loop diver sets. Bottles not included.