Grow your own Alligator inside the giant test tube. Measure him as he grows when placed in water and shrinks when left exposed to air. Make water disappear with our special water gel powder. Grow your own pet alligator made of polymer. Take it out of the water, let it dry out and do it again. Learn how to make water seem to “disappear” using the growing powder. Find out what the growing powder has in common with baby diapers. Learn the science of polymers. Ideal for ages 4 and older.