slight off topic, but science related nonetheless

I'm start a chemistry club soon and I need to find some good experiments that are do-able and fun in a high school environment. So far, I only have dumping sodium, potassium, and other metals into water. does anyone have any good suggestions? I think the club members are willing to contribute some money for experiments that require slightly more expensive and/or not readily available chemicals.

lol thanks for the idea but I need experiments that aren't crazy.

Does anyone know of any experiments that involve controlled explosions? perhaps we can make our own small scale explosives to set off in that chamber thing.

And I think most people would want to see experiments that will result in at least one of the following:
fumes, foam, bubbles, heat, fire, light, or explosions

I heard that if you put Silicon(?) Carbide in water, it produces bubbles of acetlyene gas. You can then react those with bubbles of chlorine gas, and although I know how to make those too, I'm not comfortable broadcasting that information on the Internet. If you want explosions, you could always react acids with metals, collect the hydrogen gas produced into a hollowed egg shell, and light that. I did it several times. Just wear safety goggles and do it in a fume hood.