風車與水車 - 太陽能驅動

The waterwheel really comes to life in direct sunlight, spinning smoothly for hours. My kid was genuinely impressed by how the solar module powers the whole build without any batteries.

Took me an afternoon to build the windmill with my kid, and the solar module actually spins the blades even under a desk lamp, which is a nice bonus for cloudy days. The pieces fit together solidly, so the finished tower doesn't wobble when we move it around.

The solar panel on the watermill actually spins the waterwheel nicely even on a cloudy afternoon. I spent a couple of evenings building the windmill version, and the interlocking bricks fit together securely without being too tough to press.