-  Potassium chlorate : KClO3
     -  And, well, a gummy bear!
     -  Flame (Bunsen burner, et cetera)
     -  Fume hood or outdoors (smoke!)


         Put some grams of KClO3 in a test tube (1 cm
     high; Chlorate is a stong oxidier, so wear gloves
     and goggles while adding) and melt it on a
     flame. Take the tube away from the heat source
     and fix it somehow (tube holder or clamp). Add
     the gummy bear with a pincer and take away
     your hand immediately, since a severe
     combustion starts right away.


        The gummy bear is a source of carbohydrates.
     Latter contain a lot of energy, which is released,
     when combusted. The experiment is nothing
     else than the oxidation of sugar, spontaneously
     releasing a lot a lot of energy (∆rH° = -5645 kJ/mol).

     2 KClO3  → 2 KCl + 3 O2

     C6H12O6 (the gummy bear!) + 6 O2 → 6 CO2 + 6 H2O + heat
The sacrifice of a gummy bear.