A recent CNN investigation found that the same chemicals found in Silly Putty can be found in McNuggets:
American McNuggets (190 calories, 12 grams of fat, 2 grams of saturated fat for 4 pieces) contain the chemical preservative tBHQ, tertiary butylhydroquinone, a petroleum-based product. They also contain dimethylpolysiloxane, "an anti-foaming agent" also used in Silly Putty.
All McNuggets not created equal Paging Dr. Gupta - CNN.com Blogs
Silly Putty ingredient found in McNuggets - Boing Boing)