Home Made Lava Lamps

Lava Lamps are really easy to make, we did them at Rangers as a part of the Groovy Challenge we are doing.

You need:

A plastic bottle
Cheap vegetable oil
water
food colouring
Alka-seltzer (effervescent tablet)
Glitter (optional)

Wash out the plastic bottle. A 500ml one is a good size.

3/4 fill it with cheap vegetable oil and top up with water.

Add a teaspoon of food colouring and maybe some glitter.

DO NOT STIR OR SHAKE IT!

You need the elements to be separate to get the effect.  If you shake it up it takes a while for them to separate again.
















The final part is to add alka-seltzer.

I gave the girls a tablet each and they put it in quarter at a time.

The effect is, well, rather effective!

You could shine a torch through the bottom of the bottle for an additional touch.

(Don't put the bottle on a heat source, the plastic may melt)