I have this little chicken figure from when I was a kid

It was always my favourite, and lucky me, it was one of the things my mum sent me in the mail a few years ago.

I want to hide it on market day within the building, for a customer to find. They bring it to me, and I will give them 10 market bucks (like a gift card to spend at market).

I will put a little poster on the door HAVE YOU SEEN OUR CHICKEN? And write a silly story about her liking to get lost or something, and explain the details.

Good idea? Silly? Fun? Do you have a better idea?