You will need:
*An empty 16 oz. plastic bottle
*Alka-Seltzer tablets (Only parents handle these tablets)
To make a lava lamp, you will:
*Fill your plastic bottle half way full with oil.
*Fill the remaining half with water (Leave the very top part of the bottle empty).
*Watch how the water separates from the oil. The water sinks to the bottom because it is heavier than oil.
*Add 10 drops of food coloring (just pick your favorite color).
*An adult will cut the Alka-Seltzer tablet into fourths.
*Drop a fourth of the tablet into the bottle and watch what happens.
*To get the lava lamp effect, you need to drop another fourth of the tablet every 30 seconds.
Do not drink the liquid!
To read about the experiment or the science behind it: an adult can visit: http://www.icanteachmychild.com/2012/05/make-your-own-lava-lamp/