Put them to use as a kids' mountain. Add a log and stump, and it's a wild place. Skip traditional scarecrows. The right clothes can make a man or woman instead. Underneath, any stick or wire frame will do.
Straw is the stuffing de rigeur.
Check it periodically to make sure rodents or wasps don't call it home. In an afternoon your clan can make a chicken-wire animal and train ivy around it for a nearly instant topiary. Heads will turn. All of these projects can involve and reward the whole family and make your garden the most kid-friendly place on the block.