Oh yeah; we are still searching for the "Swear machine" that we bought at a joke store in 1987. We hid it from the (little) kids, but it did manage to move across the country with us. Then, it suddenly disappeared around the mid nineties. My DH even questioned both of the grown up kids if they had taken it. Their reply was, "Are you nuts?"
It's definitely somewhere in our stuff, but... I know, it's pretty stupid.