Make a colourful lava lamp using everyday kichen items and learn about acid-base reactions in this easy STEM activity for kids.
Pour cooking oil into a plastic cup — about half full
Add tap water carefully until about three-quarters full
Add a few drops of food colouring to colour the water
Drop in an Alka-Seltzer tablet and watch the lava lamp effect begin
Observe the coloured blobs rising and falling — discuss why this happens
| School Board | Topic Covered | Grade |
| NCERT/CBSE | Acids, Bases and Salts | Grade 5–6 |
| Samacheer Kalvi | Acids and Bases | Standard 5 |
| Cambridge | Properties of Materials | Stage 4–5 |
| Oxford | Materials and their Properties | Grade 4–5 |