I did use one unusual foam source that got me in a bit of hot water with my kids. I was running a bath for them one night and noticed that the letters that they play with in the bath were........closed cell foam! Hmmmmmmmm. They were about 3/4" thick, and wouldn't you know it, my punch set worked perfectly on them. Needless to say, the kids didn't take kindly to me turning their bath letters into swiss cheese so I had to buy them more.

Thanks to you all for the info !!!!!! I'm headin for the craft store now.

Hare