Ages 6+
Get ready to make your own high-bounce balls!
This fantastic kit includes everything you need to create your own bouncing balls! Why not make a flower, football, sphere or polygon shape! Choose between vibrant neon, metallic or glow-in-the-dark colours! It has never been more fun to bounce your own design!
Features:
- 8 shapes and 16 balls to create!
- 4 packets of metallic crystals
- 4 packets glow in the dark crystals
- 8 packets of neon crystals
- 8 moulds, shapes and sports designs
- Full instructions
How does it work?
- The bouncy ball granules are mostly composed of polyvinyl alcohol (PVA), which is a water-soluble polymer with elastic properties.
- Polymers are long, tangled chains of carbon, hydrogen, and oxygen atoms.
- When the granules are moistened, their surfaces start to dissolve slowly, they swell up a little, and they become sticky.
- The long polymers get tangled up in each other.
- In this way, the granules stick together inside the mould.
- The balls are bouncy because the PVA material is elastic, which means it springs back to its original shape after being compressed or stretched.
- This elastic property comes from the shapes of the polymer chains.
- The long, tangled chains have extra space around them (think of the space between the strands of long noodles in a pasta bowl).
- When the force from hitting the floor causes the ball to compress, the polymers squish more tightly into the empty spaces.
- But at a point, the bonds between the polymers cannot compress anymore, and they start to expand again, releasing the force they absorbed, pushing the ball off the floor and causing the ball to bounce up.
Note:
- CAUTION DO NOT SWALLOW.
- Crystals are safe and will not harm the skin.
- If crystals get on clothes, wipe them off with water.
- To maintain the elasticity of the ball, keep it in a sealed container when not in use. Over time the balls will gradually dry out and bounce will decrease.
Box Size: 25.5 x 20.3 x 6cm