Walk around town looking in Shop Windows to see which item is the ODD ONE OUT.
List of Shops and items to look for (done in advance by one of our helpers) - e.g. tent pegs in chemists, shoe in opticians, rubber duck in sweet shop windows.
Plenty of adult helpers to walk around the town with Beavers and Cubs.
General scouting items such as tent pegs, neckers, uniform item for example.
Split into teams with enough adult helpers - one list for each team.
Direct Teams to various shops to work out what should be in each shop and which item is the odd one out.