Bill Nye the Science Guy
This site has many ideas for all branches of science. Focus in on the chemistry demonstrations that are listed.
This site explains the demonstrations quite well. Go through the list but choose an experiment where a chemical reactions is taking place (remember the difference between a chemical reactions and physical reaction we discussed in week 2).
Science is Fun
A lot of fun demonstrations that can be done in the home. The demonstrations with red cabbage, chemiluminescence, removing tarnish, gluep, making things glow in the dark, fizzing and foaming are all chemical reactions.