Space
The Exploratorium 
 Create an apparatus for viewing sunspots, Search for extraterrestrial life, and see a live web cam of Mars. 
 The Space Place 
 Be able to name trees from space, find out why the sky is blue and discover how to shrink a building three different ways. Lots of online space Games, activities, and fun facts. 
 NASA Kids 
 Exactly how hot is the sun? Can astronauts sleep standing up? And is it possible to escape the Event Horizon of a black hole? 
 Young Astronomers' Learning Center 
 What is a Brown Dwarf? What's the difference between a meteor and a falling star? What are solar winds? The Learning Center provides all the answers you need. 
 NASA – Be a Spacecraft Engineer 
 Your mission: Help scientists plan a mission to a comet. Design your own spacecraft. And protect the international Space Station from space debris.