Make a lava lamp

Making a lava lamp is not only fun, it's a sneaky science experiment. Try this simple science experiment, which will teach your children about density. Your kids will love making their own homemade lava lamp.

What you need:

• clear plastic bottle with lid
• vegetable oil
• water 
• food colouring
• Alka-Seltzer tablet

Number of players:

Activity:

Watch the video to find out how we made our homemade lava lamp. Thanks to our sister company Kidspot Australia for creating this.

Fill the bottle three quarters of the way with vegetable oil.
Fill the rest of the bottle with water that has been coloured with food colouring.
Close the bottle lid tightly.Wait for the two layers to settle.
Break the Alka-Seltzer tablet into small pieces.
Drop small pieces of the tablet into the bottle to create a bubbly fizzy lava lamp.