Our friend, Jim Fitzpatrick, who has been involved with Montessori for more than forty years, gave a wonderful TEDx presentation on the power of the binomial cube. He jested, in all seriousness, that it's the "key to the universe". We'll let you decide. If you have a few minutes, we strongly recommend that you view the short video. We think you'll enjoy learning about everything that exists in this beautiful, captivating Montessori material. It sure beats turning to page 62 in that ominous text book.