Another science fair idea: Make rainbow roses by splitting the stems into strands and placing each one in food coloring. The roses draw the food coloring into the petals.Hmmm not a bad idea for Amarah's Science Fair Project!
experiment with sugar and water to see what colors ants prefer - and look at their bellies. You can see what color of sugar water they are drinking. My kids would love this. Then they would squish the ants.
Make glowing water WITHOUT highlighters! This new recipe from Growing A Jeweled Rose is a great alternative as it is made from kid safe materials (non-toxic fluorescent paint) with a RAINBOW of waters to add to your play!