A real DIY hit: with this Ylvi set you can create your own colourful balls. And it's child's play: Fill neon granules (pink, orange, yellow, green, blue, purple) into the mold, immerse in warm water for 20 seconds and after 15 minutes the ball is ready. The balls can even bounce for one or two days. Four different sets, each with different colored molds (pink, purple, blue, green).