Salt Volcano: Pour several inches of water into a jar. Add about of vegetable oil. Drop in food coloring and observe what happens. Shake salt on top of the oil/water/food coloring mixture. Pour or sprinkle more salt, as desired.
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)
Growing crystals is a great learning activity, and will require some patience since they do not grow immediately, but may take a few days. Learn about evaporation, precipitation, and more with these Holiday Crystals.
Elephant Toothpaste - cup hydrogen peroxide liquid is a solution, which can be found at a beauty supply store or hair salon), 1 Tbs (one packet) of dry yeast, 3 Tbs of warm water, liquid dish washing soap and food coloring