You need:

  • fizzy tablet
  • Alka-Seltzer tablets
  • plastic bottle
  • food colouring

Instructions:

    1. Get everything ready.
    2. Put water in the bottle.

3. Put oil in. Fill close to the top.
4. Drop in food colour.5. Drop in the fizzy tablet.

The coloured bubbles rise!

Blobs In A Bottle Lava Lamp