Had a barbecue?
If you cannot resist pratting about with the glowing embers afterwards, then just blast the charcoal with bellows/bike pump. Yes it might blow the ash about but you get some satisfying flurries of sparks.

On no account stick the remains of a large candle on to see how quickly it melts. Although it doesn't melt as quickly as you'd expect, it does produce more smoke than your average Buncefield Oil Refinery that will fill your garden and neighbouring gardens with thick white smoke.
( sandettie light vessel automatic New Twitter - @bollocksreally, Tue 27 Apr 2010, 14:21, Reply)