Fill each empty bottle about ¾ of the way full with oil.

Fill the rest the way with water until about 2 inches from the top.

Put in 4-5 drops of food coloring into each bottle.

Drop an antacid tablet into each bottle and watch all the bubbles start up and float all around like a lava lamp.

After the tablets were all dissolved, and the bubbles calmed down, I added another tablet to the bottles and repeated the lava effect.

Fun Science experiment for kids to do!