Introduce younger students to space objects and how gravity affects them. Then have them explore the effects of this force with the Gravity Game. 

We owe our lives to gravity. It holds the atmosphere to Earth and keeps us all from falling off into space. Not to mention that without gravity, the stars and planets—including Earth—wouldn't even exist!

Did it all start when an apple bopped Isaac Newton on the head? This activity explores some of the ways his fundamental laws are expressed in our dynamic solar system.

Confused about fusion? You won't be once you've completed this experiment, which demonstrates how a strong nuclear force can fuse two protons that naturally repel each other.

Who said daydreams are a waste of time? One of Einstein's flights of fancy led to the equivalence principle—the knowledge that while an object is in free fall, it's free of gravity's effects.