Weather: Fill the cup with water. Put shaving cream on top for a cloud. Explain that when clouds get really heavy with water, it rains! Then put blue food coloring on top of the cloud, and watch it rain.
Creating your own rainstorm...this is so cool! All you need is a clear container, water, shaving cream, food coloring and droppers. Have kids make predictions by drawing what they see and think will happen.
This would fascinate kids. And me. Rainbow roses, you can do this by splitting the stems into strands and placing each one in food colouring the roses draw the liquid colouring into the petals, amazing!