Viking Toys' Froghoppers come in a reusable tub and are dishwasher safe. They are great for kids ages 3+. Included are 16 plastic frogs, in four colours: yellow, green, red, and blue. Froghoppers is a great educational tool for teaching colors, counting, and simple math. They can clip together and stack, but kids will find the most fun in watching them jump around. Simply push down on the frog, and away it hops!