This is a game for two players. You will need 12 `biscuits', but perhaps something like buttons will be less fattening than real biscuits. Put four biscuits into one jar and eight into the other jar. (Just make the two groups).

Each player can take biscuits in one of two ways:
1. By taking any number they like from just one jar or
2. By taking the same amount from both jars.

The winner is the person who takes the last biscuit/s.

Think carefully! See if you can discover a winning strategy before your friends do.