#6 plastic doesn't recycle? Pshaw! Chris Job has the 4-1-1 on making your own Shrinky Dinks using clear #6 plastic containers. Which is great, because if you buy Shrinky Dinks in the store you're paying 5 bucks for same! He also has a lot of other cool stuff on his blog at Curbly so check him out!
Swiped this photo of Shrinky Dink example from the above DIY post