InterpRanger

Hi folks! We have a summer challenge at our site for people to find and object that will move about once a week. I'd like to know if I can make it into a geocache or something similar for the summer, but not sure if it fits! It is a chair that will be moved, people must find it, take a photo, and post with a proper hashtag. I was hoping that I could tie the chair and challenge to geocaching as well. Does this make any sense? Thanks!