1.  Chem 4 Kids
Great site with activities and an interactive periodic table.
http://www.chem4kids.com/

2.  The pH Factor
Guess the pH of common household items and other experiments to try.
http://www.miamisci.org/ph/

3.  Chemicool Periodic Table
Use this interactive table to check out the elements.
http://wild-turkey.mit.edu/Chemicool/

4.  Quia – Chemistry top 20 Activities
Try your wits against the computer on some of the chemistry activities.
http://www.quia.com/dir/chem/

5.  Chemistry Quizzes and Activities
Is that your final answer?  See how much money you can make.
http://www.syvum.com/squizzes/chem/

6.  Experiments to try at Home
Make your own slime and test for acids and bases around your house.
http://chemistry.about.com/cs/homeexperiments/

7.  Another Great Interactive Periodic Table
http://pearl1.lanl.gov/periodic/default.htm

8.  Interactive Periodic Table
This great site sponsored by Jefferson Lab has a super periodic table and element hangman.
http://education.jlab.org/itselemental/index.html

9.  Kid Friendly Periodic Table
The best place to start learning the basics about individual elements.
http://www.bayerus.com/MSMS/ScienceFun/PeriodicTable/PeriodicTable.aspx