How can you lift an icecube with a matchstick?

You will need:

An ice cube
A matchstick
Salt

What to do:

Sprinkle some salt on top of the icecube.
Place the matchstick lengthwise on top of the icecube with part of the stick extending.
Wait a few seconds.
Now try lifting the matchstick up.
The matchstick is frozen to the ice. So the icecube can be lifted using a matchstick.

What's going on?

The matchstick becomes attached to the ice cube because the salt lowers the freezing point of water and melts the ice. The top of the ice cube quickly re-freezes which traps the matchstick. Simple eh? Plus a great trick that you can do whilst waiting for your food to arrive next time you're out for dinner.

See more experiments like this on the practical of the week link.