Any ideas on good demos/practicals for a chemistry open evening (for the public)?

Question

Topic for the evening is 'environmental chemistry'. Thought about fuel cells, but have no H2 or O2 cylinders. Any other ideas.? Whizz bang ideas particularly welcome.

Answer 1

Here are some cool demos you can do easily.

go to this web site for easy to do demos with common household products , etc.

http://littleshop.physics.colostate.edu/...

Good Luck Wise !