Re: Coloured Smoke...
You can always use LEDs and exhale the smoke over them. I think H-S even has some "watertight" LEDs that you can stick in your base. Not my thing but it'd be a lot safer than adding chemicals. Every now and again I have a friend who spins fire/led light staff and he detaches the LEDs from the staff and it looks fun for about 5 minutes. Kinda gimicky if you ask me but to each their own.
36" Al Falkher Solid - 36" KM Copper Heart Two Hose - 22" Temsah Mini-Wheat(a.k.a. Golden Nugget)