If you’re looking for a Summer Camp activity, one good one is a simple treasure hunt. You can either review “Where is Mr Monkey?” and have clues that use near, next to, under, on etc.
Or you could make your own Da Vinci Code Game. Simply have the code spell out words like “desk” or “clock” etc. and have the next clue hidden under the desk or behind the clock etc.. Very simple, but lots of fun!