Speaking of computers and this particular bookshelf idea...
If you want to freak out your magic buddies, make certain the supporting shelf is one of the major "hard to get" collector type books that sell for thousands of dollars... it will seriously hurt their heads thinking your modified such a valuable tome in this manner.
The stuffed animal idea found at this link (scroll down)
http://www.firebox.com/product/1538?src_t=hfp is quite cool as well... just change it over to a top hat and rabbit... and I love Mandrake's idea of the hand holding them up ala serving tray... that's rather cool... especially if you need an angle bracket for added support of the shelf due to weight.
I've got a few other ideas floating around in my head with this concept
