Interactive way to encourage Beavers to think about hazards
A place where you can set up various "dangers" and the "dangers" themselves
Introduce the concept of dangers at the location. Walk though with the Beaver's trying to identify them. Suggest that this can be done at home as well. You could do this in groups whilst Beavers are playing games. Make sure there are enough dangers for every Beaver int he group to identify at least one each.