On Jul 17, 2013, at 1:23 PM, kirby urner <firstname.lastname@example.org> wrote:
> It did catch on, in the 1900s, and there's a branch of mathematics exploring this new territory.
You keep jumping here, but you started at very different spot. You said that this would supplant the orthogonal cube as the mental reference for volume with kids. I said that you have enough material for a great 10th or 11th grade math course. Why blow it?:)