Tangram Teasers: Take the tangram challenge! (Book-in-a-Box)

So, what's different about these tangrams? They're double the value, that's what! First solve the puzzle by creating the shape shown, but then change it into the new shape in only the set number of moves indicated. Just when you thought tangrams were easy, they got harder. But there are three levels of difficulty and so you can start off gently, and then get more and more teased! Try the tangram challenge. But watch out - tangrams are addictive!