I work at Montessori school and we have these cylinder blocks of different sizes for toddler and primary children to use in the classrooms. It just dawned on me that you could do a small version of this with battery cells now: 1650, 2170, and 4680. Thought it would be a neat idea and a way to slowly show the children how these shapes are what help to run (and will run) transportation and energy storage in their future world.
