crayolastore.com has 5 lb. blocks of Silly Putty available for $59.99 shipped free. If you add coupon code BBTHANKS03, you get the price down to $50.99. If you buy it direct from Dow Corning, it's $8 a pound and you have to buy 100 lbs. at a time! Thanks to fatwallet.com for this deal.