Nicolas Nova just created a recyclable paper dinosaur that, by design, fits the canonical requirements for being a spime. Sorta. Kinda. Almost. Most of 'em.
http://tecfa.unige.ch/perso/staf/nova/blog/2006/07/20/early-version-of-a-dinosaur-spime/I'd be guessing that kid's toys have an excellent chance at spimedom, since kids are so bad at putting them away.