WebElements.com
A great periodic table with ALL the info, including pictures of atoms and molecules for all the elements.

The Homework Center
More fun science links than I can count.

Multimedia Physics Studios
Some really good physics videos (moving gif's) and explanations.

How Stuff Works
If you want to know how ANYTHING works, I'm sure you can find it here! This is a WAY COOL site!

Science Toys
Make your own gadgets - great for science fairs.

Science Fair Projects
How to choose, do and present the best science fair project of all time.

Bill Nye the Science Guy
You love the show, so check out the website! Fun activities you can do at home!

Archimedes' Laboratory
Puzzles, illusions, tricks and games all using math and science.  Tons of fun!

Bill B's Homepage
Links to do-it-yourself science projects for all occasions.

Funderstanding Roller Coasters
Make your own roller coaster and see what happens!

Science Fair Homepage
Science fair projects for all ages.

JELL-O Optics
Fun projects with JELL-O, such as "how does your eye work"?