Marble Races with a cheap pool noodle (kids would be occupied for hours.)
Exploding bags with baking soda and vinegar-science lesson. They take off like rockets!
Fairies in a jar DIRECTIONS: 1. Cut a glow stick and shake the contents into a jar. Add diamond glitter 2. Seal the top with a lid. 3. Shake.
Teaching density! Shake it up and watch it separate again!