One of my very favorite songs that we listen to over and over again is sung by Bev Bos, Michael Leeman, and Tom Hunter. It called Build It Up, and you can find it on the album "We've Been Waiting for You" "Build it up, and knock it down, and build it up again...." When our new pet turtle arrived, I needed to rearrange the classroom in order to find a place for our new friend, and rearranging often means that the children have a new found interest in materials simply because they are in a new location. That was definitely the case with our large hollow blocks. They have been building... and building.... and building.... These large hollow blocks are perfect for the children to play with! I love to watch how creative they are in their structures and the interactions they have while working together to build it up! Sometimes as high as they can..... Sometimes as BIG as they can.... flat on the floor.......