How to make Bubbling lava lamps (homemade)
- Vegetable Oil
- Alka-seltzer tablets
- A plastic or glass bottle (the library used a 2-litre bottle so it was big for all to see, instead we opted for a smaller glass bottle to use up less oil)
- A flashlight
- Food coloring
Put the oil in the bottle. Fill it about 3/4 full. Add water to fill the bottle the rest of the way. Add several drops of food coloring (just watching the food coloring go down is fun!). After that settles add some alka seltzer tabs. Shine the flashlight from the top, and watch the magic!
We still have the bottle on the window sill to do again when Alex gets the urge to see it again.