So I was going through my homeschool folder on my PC and located a page I had forgotten all about bookmarking. My son spent all day yesterday doing these fantastic science simulations and playing a space simulation game. I finally had to kick him off my PC at 7pm for dinner!
They were made by University of Colorado Boulder.

If you have kids who like to play video games then they will probably get a kick out of these interactive science lessons. And you can tie them into whatever you are learning about in Science.

Phet Interactive Simulations