Ghosts?

Someone at our house seems to use the last of the cereal and popsickles and not throw away the empty boxes. He also mysteriously added several items to my laundry this weekend. Somehow I ended up with extra shorts, a swimming suit, some extra ball socks, and a couple of other items which were not familiar to me. Nobody at our house seems to know who is responsible for these things, so I am assuming it is a ghost.