I spent hours drawing and cutting out tangrams from tagboard last night.  The kids are having a blast.  We talked about the math part of it and Geometry.  We talked about the spacial part and now they are trying to create shapes out of them.  It is a lot harder than they thought.  I have one VERY spacial student and he is having a blast.  He is always the first one done.  He can sit and create other shapes on his own.  They think they are playing a game right now.  Tangrams stretch the visual imagination, make them organize their thoughts and use visual skills.