The block is fun. The young man is obviously enjoying himself while teaching us a new trick. He lost me a couple of times with the math, but if I slow down it really isn't so confusing. Think I'll definitely try the Burst Block, the possibilities using different colors intrigues me. This would be a great project for the new member who inquired about layer cakes as it shows what amazing things you can do with some ten inch squares. Thanks for sharing the link.