Link: What a package!
The University of Chicago Receives a Bizarre Package
"They have no idea who sent it or why; since the postage was fake the sender had to mix it in with the inbound mail before someone went through it. It could be a student project, it could be a staff member who made it as a gift and accidentally put it in internal mail, or someone in the office could be playing a fun joke."
Package deflated. :( Link: Mystery Solved