Oh, he's already an escape artist! Getting in and out of the apartment can be, hmm, adventurous at times. He's tiny and he's quick, and he's incredibly eager to explore.
how short are we talking? something like 12 inches, or more like a light, thin dog leash? I could leave something like that on him for a while, as long as we were in the bedroom (i've got a reclining couch, with movable parts under that a trailing leash could get hooked on)