Rainbow Wind-Up Fish for Baby Adorable and bright color design appearance. High quality plastic material. Safe and solid When full win-up, this fish can run on the flat surface. its tail will swing. They’re assorted among 5 colors (Red, Orange, Yellow, Green, Blue and rainbow-colored segments following in ROYGBV order) and are great for day care centers, preschools and at home. It Develop child’s intelligence, and the ability of distinguishing animals and colors. Gone fishin’! These plastic wind-up rainbow fish will keep younger kids entertained for hours as they wind them up and watch them swim. The side fins move up and down and the tain moves back and forth as the two drive wheels spin to propell the fish with a third wheel to stabalize it. There is a small white wind-up knob on the side to wind the spiring. No batteries required.