- Dissolve half a tablespoon of borax in 2 tablespoons of water in a cup
- In another cup, mix 1 tablespoon of PVA glue and 2 teaspoons of custard powder
- Add 1 tablespoon of borax solution to the glue and custard powder mix and stir until soft
- Knead until elastic
- Roll into a ball and then bounce it!
Keep your ball in a sealed plastic bag to stop it drying out.
Don't leave your ball lying around on the carpet or the furniture - it may damage them!
Disclaimer: Please follow the instructions carefully. This is for your own safety and the safety of others. Do not improvise or change the quantities or actions or othe order in which each step in the experiment is listed.