I have an idea similar to this that would secretly teach circuits: The game would be a water-tube building game. Voltage would represent the height drop that c

I have an idea similar to this that would secretly teach circuits: The game would be a water-tube building game. Voltage would represent the height drop that causes the water to flow, current would be, well... current, resistance could be marked by notches in the tube section, etc. Each scenario would involve building a water maze to reach a specific objective. Gradually, different tube sections would be replaced by circuit schematics, until at the end of the game, you would be designing straight-up circuits. Feel free to build this, just let me know when it's available :).