Find a clear plastic container with a lid, and fill it with rice, pebbles, split peas, or whatever else you happen to have on hand.
Along with the filler include little trinkets (safety pins, coins, small plastic animals, even little pieces of paper with things drawn on them if you like). Decide how much filler you want to include. (more, to make it harder, less for easier; the size of the container will also make it harder or easier)
Post a list of the things to be found on the outside of the container.
Include one item that is not listed, and make it some kind of a treat (maybe a note that says "Ask mom for a candy", etc).
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