Bathtub Science Author:Shar Levine, Leslie Johnstone Kids love the tub?and it makes a really cool "laboratory" for carrying out experiments that are gallons of fun. Find out why some toys sink but rubber ducky always floats. How a submarine works. Why animal crackers become mushy in water. Make a "wave machine," a water cannon that blasts mind-boggling explosions of liquid; zippy hydroplanes?or pe... more »er through periscopes and prepare perfect bubble solution. Every page bursts with brilliant drawings, and loads of photographs that display the entire process.