National Geographic Critter Cam – wild animals (safely) wear cameras, and show us videos of what happens when humans aren't around!
ED Heads – Simple Machines – learn about simple machines using fun games and quizzes.
Magic School Bus – Games and activities with Miss Frizzle and the gang! From Scholastic.com.
Handcrafts for Kids – a virtual crafting studio that lets you virtually try quilting and other hand crafts.
Dave Pilkey's Website O'Fun – The creator of Captain Underpants and Ricky Ricotta brings you hilarious games and puzzles.
The Why Files – cool facts for the older crowd!