KID SAFE Two-Color Oil and Water Discovery Bottles @ Play Trains! These vibrant discovery bottles contain no lamp oil, using all edible ingredients to make them safe for young children to make themsel (Pour Water Activities)
Indoor Activities for Kids: Homemade Lava Lamps. Vegetable oil, a about of the water bottle, then water. 10 drops of food coloring. Then take a alkaseltzer tab and break it into 4 pieces. Drop one in at a time and wait for each to dissove!