Electricity
https://www.stevespanglerscience.com/lab/experiments/static-flyer-flying-bag/
Light
When you look into the back of a spoon your reflection is upside down. Why is that? Why do your eyes see it this way? Present your findings in any way you wish.
Make shadow puppets which could be used to tell stories.
Take some photographs which show/use light in an interesting way. (This could be natural or artificial light)
Living Things
Evolution and Inheritance