With the Mini Lab Bouncy Balls experimentation set from Buki, you can make your own colorful bouncing balls. The set contains five bags of elastic powder, from which up to five bouncing balls can be formed. Individual balls can glow in the dark thanks to special particles. The powder is poured into the supplied spherical mold and solidifies after a short time. A multilingual instruction manual guides you through six different activities in a structured way and teaches interesting basics about the elasticity of the finished balls.