Make a Lava Lamp

Becky shows you how to make a lava lamp.

You will need:

• Water

• A clear plastic bottle such as a fizzy drink bottle

• Vegetable oil

• Food colouring

• Alka-Seltzer (or other tablets that fizz) – Please ensure this part is supervised

Add water into the plastic bottle until it is around one quarter full

Pour in vegetable oil until the bottle is nearly full.

Wait until the oil and water have separated.

Add around 12 drops of food colouring to the bottle.

Watch as the food coloring falls through the oil and mixes with the water.

Break an Alka-Seltzer tablet or similar into smaller pieces and drop one of them into the bottle, it will start to bubble like a real lava lamp!

When the bubbling stops, add another piece of Alka-Seltzer and watch the lamp change.