How about a Treasure Hunt..
Works with all ages including adults!
Great in teams - but make sure you are organised before you start!
What you Need to Do
Work out where you are going to hide the clues, (is this going to be around the house, garden, neighbourhood.....
Work out what the clues will be. (The first one is always the hardest - but it gets easier as you go on.)
Write the clues out in advance - allow your creative juices to flow...
Number them (and if you are playing in teams put the name of the team on as well. It stops cheating and people stealing each other clues)
Hide the clues - making sure they are in the right order (and of course no one sees you hide them) Remember clue 1 one you give them to find the hiding place where clue 2 will be. So clue 2 will show hiding place 3. (it is easy to get mixed up which is why I thought I would mention this and also why it is a good idea to number the clues).
Additional prizes can be swopped for every clue found. You could even have time incentives for how quickly they find clues or complete the hunt.
Make sure you plant the Treasure at the end.