The children loved our science experiment today - making a lava lamp with household items. I thought some of you might want to try this at home. You will need 1 empty bottle, vegetable oil, water, food coloring, and alka seltzer tablets.
Pour oil into the bottle until the bottle is 1/2 - 2/3 full. Add water until bottle is mostly full. Add a few drops of food coloring and watch the colored water sink to the bottom of the bottle. You may want to put the lid on the bottle and swirl or shake gently to demonstrate how even when the water moves, the oil stays on top of the water. Add half an alka seltzer tablet and watch as bubbles of colored water are forced upward through the oil. When the contents settle, you can add another tablet and watch it all over again.
The children were mesmerized by this.
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