Divide the whole camp into groups of 8 or 10 campers (each with a counselor or two to supervise). Have the campers or leaders go all over camp collecting items in a bag... from their tents, the arts and crafts area, the camp kitchen, just random stuff... Give each group their own bag full of stuff. Give them a half hour to come up with a skit using all of the items (note:the items should not be used for their actual purpose).
Then take turns presenting your prepared skit to the other groups.