A homemade Pitagora Suitchi (Pythagora Switch) device collectionRion NakayaAugust 8, 2014December 27, 2017
The LEGO Great Ball Contraption: 17 different modules of incredibleRion NakayaSeptember 20, 2012September 14, 2018
Pitagora Suitchi (Pythagora Switch) – Marble chain reactionRion NakayaJanuary 23, 2012January 3, 2017