Heat - Make popcorn to demonstrate that heat causes expansion. The corn pops out of its skin!
Rainbow- Explain how white light is made up of the colors of the rainbow. Do you know that your back must be to the sun in order for you to see a rainbow?
1. Try creating one with the garden sprinkler!
2. Cut a circle of card and divide it into 7 sections. Color each section a color of the rainbow. Make a hole in the center, thread it onto a piece of string and spin it until the colors become white.