It's not wise to combine dangerous chemicals that create explosions at home. But this interactive YouTube video allows you to pick and choose from a variety of substances to create your own big bangs from the safety of your computer. It's really quite fun.
The interactive BBC video allows you to pick and choose from a range of chemicals, then have a chemist scuttle off and play around with them — usually resulting in a large explosion. Can you work out which combination will provide the most impressive display?