SLIME

What you need:

• Plastic cup and spoon
• PVA glue
• Water
• Borax
• Food colouring

What to do:

• Put 14g of borax in a jar, add 250ml of warm water. Put on lid and shake until dissolved.
• Measure 2 tablespoons of PVA glue into plastic cup.
• Add 2 tablespoons of water, a drop of colouring and mix.
• (you can use other quanities just make sure it is 50/50 PVA to water)
• Now the tricky part. Add the borax drop by drop until the mixture starts to become sticky. Don’t put too much in as it will become too stiff.
• Seal in a zip lock bag when finished.

What We Saw:

The first time we did it, we made it too stiff and it just broke into crumbly bit. The next time we did it we added the borax slowly and watched it as it slowly started to become sticky. It was amazing to watch as the mixture became more and more gooey. We got it out and squished it between our fingers. I was loads of fun.

What happened:

The polymers in the PVA reacted / bonded with the Borax (sodium bonate).

Written by Mummy and the Kids