I returned to my classroom and each day since blocks have been a morning choice. I took an inventory of the blocks in my room and discovered there were lots. I have a three dimensional block set in natural wood. I have colored one inch cubes. I have natural wood one inch cubes. I have a colored set of building blocks that's perfect for a table top and I have the traditional larger wooden blocks great for building on the floor. I think offering a variety of blocks provides choices and will create more spatial flexibility. I'm only offering one set at a time right now so it's something different daily. I was thrilled last week when three of my girls wanted to show me what they did with blocks. We are defying research, we are building spatial knowledge, we can do geometry in kindergarten!