Engino Discovering STEM 物理法則セット：慣性、摩擦、エネルギー保存を学ぶ、9歳以上向けおもちゃ（6モデル）

My 10-year-old built the friction ramp on his own and spent an hour testing different surfaces without me prompting him once. The pieces snap together solidly, though a couple of the smaller pins took some force to click in. Good kit for a kid who learns by doing rather than reading.

We used the spinning top model to demonstrate inertia for my son's science project, and it clicked immediately. He built all six models in two afternoons.

My 10-year-old built the catapult first and spent a solid hour launching it, then actually asked why the heavier ball flew differently. The energy conversion model made that click for him without me explaining anything. Six builds means we still have plenty left for rainy weekends.