to the sculpey gurus

[aintlifegrand.livejournal.com]

i'm at my parents house for christmas break and i was going through some old stuff in my room and discovered that i have a GIANT box of sculpey clay.... like a box of 30 diff colors!! i must be some stoner b/c i don't remember WHEN or WHERE i got these... but only 2 or 3 of the colors are actually opened and the rest are sealed...

anyways, does sculpey "go bad?" ... this stuff has got to be at least 5 years old i think... any advice?