Also swimming pool chlorine with ammonia gives a lot of smoke (mostly NH4Cl). But be careful with this combination. In small quantities (1 gram of solid organic swimming pool chlorine + 3 ml of household ammonia) you will have fun, but please don't use larger quantities. The smoke is mostly NH4Cl, which is non-toxic, but it also may contain some NH2Cl, which has a very nasty smell and is toxic. If you do this smoke-trick with swimming pool chlorine and ammonia, only do it outside!