Several pairs of shoes
My kids love to try on and wear my husband's and my shoes, so we made a game out of it. Get several pairs of shoes and put them in pile, then have the kids race to the stack and try to put on a matching pair. When they tire of that pair, they can go back to the stack and find another pair. For those whose children like to put things away in an orderly manner, they can help line up the shoes in the closet when the game is done.