What’s the weirdest thing you had to send to daycare?

One day a few months I looked ahead on the daycare calendar and saw that we had to send in {drumroll} a potato. I purchased said potato and sent it in on the right day. And then it came back in my son’s backpack untouched. So I kept it in there. And it got sent back. All week. They never even used it. I finally asked the teacher and she just shrugged. Can anyone beat a potato?