Get crafty and make your own bouncy balls that flash when they bounce each make your own bouncy ball kit contains two led centres and eight satchets of colourful powder so that you can create your own funky designs for two light up balls simply place the light up centre in the middle of the mould pour in your colourful powders and set in cold water youll them have two flashing balls to play with even in the darkr r make your own flashing bouncy ballskit makes two flashing bouncy ballseasy