Make your own helicopter using a paper clip and a sheet of paper. Hold the spinner up in the air, let it go, and watch it spin gracefully to the ground.

Here's an interesting activity that will enable your child to make his own magnifier out of a drop of water

This science fair project demonstrates the principles of reflection through simple experiments involving mirrors and light.

Here's a classic celery science experiment that uses celery and food coloring to demonstrate how plants absorb water.