These frisbees are lovely to colour-in and make for an exciting indoor frisbee game. Very easy to throw. Made of robust, premium cardboard. Designed specifically for use indoors. In each pack, there are 3 designs: under the sea, safari, and outer space. Each frisbee diameter is 20 cm. This set of 30 frisbees is great value...add crayons/pencils and your party is sorted! The illustrated booklet explains how to fold, throw, and catch the frisbees, the history of the frisbee, and 5 fun games to play with them.