Funtime Gifts Science Museum MAKE YOUR OWN BOUNCY BALL KIT 10795

MOULD TWO BOUNCY BALLS YOURSELF: Mix the putty with the activator, swirl the pink and purple by hand, then press it into the mould for a clean round finish. The colours are yours, so no two balls ever come out the same. A REAL CHEMICAL REACTION: Silicone putty and an activator combine in a cross-linking reaction, turning a squishy paste into a solid, springy elastomer. Children watch the material change state rather than just mixing colours together. BOUNCE THEM THE SAME DAY: Unlike crystal-growing kits that need days of evaporation, this one cures in 20 minutes. The experiment finishes while interest is still high, and the result is something they can actually take outside and play with. LEARN ELASTIC ENERGY: Each bounce demonstrates how an elastomer stores energy on impact and releases it springing back into shape. A hands-on introduction to polymers and energy transfer that lands better than a diagram does. BEST FOR AGES 8-12: Everything you need is in the box with clear instructions to follow. The mixing and moulding suit confident hands, so it works best from around eight. Not suitable for children under three.