My husband had a hard plastic tangram from high school that we played with, but it was very slippery on the lamination, and as I thought about what else I could use, I discovered that the foam sheets that I had purchased from the dollar store were the perfect size! I traced a tangram on all six colors, and cut them out to make a very attractive set. I also cut out all of the exercises in the book, as well as a double-sided set of puzzles that I found here. These made an excellent Christmas present for our extended family.
I am amazed at how versatile tangram activities are. Some of the puzzles have challenged me, and yet my daughter who is not yet two has been able to do outlined puzzles.