Racing cars with magnets tapped to them
4 teams - each with 2 matchbox type cars and some magnets taped to the tops.
Beanbags or objects at other end of to race to
Tape the magnets to the toy cars so that they repel each other.
The idea of the game is to try and race the cars, pushing along as the magnets repel each other to the end and back again. Each Beaver takes turns until all members within the team had ago. The first team to have all a go wins