|Hopping Half (UK 10p/2p version)|
A classic coin trick. Show both sides of an 2p coin and a 10p coin. Repeatedly, remove one of the two coins from your hand and place it in your pocket. Open your hands to reveal both coins are still there.
Then, to knock their socks off, show the 2p coin and close your hand around it. Upon opening your hand, the 2p coin has changed into the 10p coin.
Requires little skill.