I recently implemented “Science on Saturday” projects with my youngest daughter. This little ritual is a hit. One of our favorites are the Easy Lava Lamps we made with her cousin.
Easy Lava Lamps
You will need:
Plastic bottle (water or pop)
Alka-Seltzer tablets (generic is fine)
Wash the label off your plastic bottle and then fill approximately a quarter of the way full with water.
Pour vegetable oil into the bottle, almost to the top.
Let the oil and water separate and then squeeze about a dozen drops of food coloring inside.
Watch the coloring fall through the oil and mix with the water.
Break an Alka-Seltzer tablet into small pieces and then drop one piece into the bottle.
When the action slows down add another little piece.