A rainy afternoon might be a good chance to get the boys busy designing a camp crest. This will not take everyone's interest, so you might run it in conjunction with some of the other suggestions. There are many books on the market with these diversions. Find a good one and buy a number of copies so that each group can work on the same puzzle. Toss one into each tent, along with a pencil, to see which patrol can finish the same puzzle first.
Songs Have the boys write new words to an old, well known tune.
The theme should be suggested to them, perhaps a song about camp life, or about their city, town or province. Of course, it goes without saying that the boys will be expected to present their song at the first opportunity, preferably the next troop campfire. Smallest Cup of Tea Provide the boys with a thimble, a 50c piece, a box of wooden matches, a tea bag, a bit of powdered milk and a bit of sugar. A Crafty Idea Give each tent a box of alphabet macaroni, some white glue and one or two popsicle sticks per boy. Write a message to another patrol using a firm sheet of cardboard on which to glue the letters.