Beavers run to bases decided by the dice. Works best if you make a big dice and stick the pictures of your theme on dice.
Chalk, whistle, dice
Number 6 bases around the room. Beavers run around - Leader has back to room. Leader blows whistle and the Beavers then have to choose which number (base) they want to stay at. When they have all decided, the Leader turns around and throws the dice. Whichever number the dice lands on - whoever is on that base is "out". The game continues until the last man is "out".
Name bases after the theme of the evening e.g. football teams, transport types - a good game which can be used for anything