The Golden Bead Cube Weighs One Kilogram

Bruner’s enactive stage and Montessori’s materials both understand that abstract concepts must be grounded in physical experience before symbols can carry weight. The touchscreen skips that stage entirely — and the learning data are beginning to show it.

11 December 2025 · 11 min · Sebastian Spicker

Non-Commutative Pre-Schoolers

The same structural reason a toddler cannot put shoes on before socks is why position and momentum cannot be simultaneously measured. Non-commutativity is not exotic physics — it is the default logic of any ordered world.

13 November 2023 · 9 min · Sebastian Spicker