TRY SOME LAVA IN A CUP

1. Fill the glass about 3/4 full of water .
2. Add about 5 drops of food coloring.
3. Slowly pour the vegetable oil into the glass. See how the oil floats on top.
4. Sprinkle the salt on top of the oil.
5. Watch blobs of lava move up and down in the glass!
6. If you liked that, add another teaspoon of salt to keep the effect going.

A glass is filled about 3/4 full of water. Five drops of food coloring is added. The vegetable oil is poured slowly into the glass. Is seen how the oil floats on top. The salt is sprinkled  on top of the oil. Is watched blobs of lava move up and down in the glass. If you liked that another teaspoon of salt is added to keep the effect going.