Joe's stash of broken appliances might seem like junk to some people, but to Joe, it's treasure - his only source of cash. So when someone steals it in the night, he's angry. And he thinks he know who's to blame.
Someone has taken Joe's stash. It seems like junk, but it's special to him. Joe designs a trap to catch the thief. Design and draw a different trap that would show Joe that someone is taking his things. Use different items to those that Joe used. Show your design to your family. Do they think the trap would work?