Engino Discovering STEM 建築セット：エッフェル塔とシドニー橋を組み立てよう：9歳以上向け工学おもちゃ（11モデル）

My 10-year-old built the Sydney Bridge first and spent almost an hour figuring out how the truss pieces lock together, which is exactly the kind of focus I was hoping for. The set covers 11 models, so it's still keeping him busy weeks later instead of getting shelved after one afternoon.

The included theory booklet explaining forces and loads made this more than just building—my son actually understood why the

My 10-year-old spent a whole rainy Saturday on the Eiffel Tower build and barely looked up. The little theory pages on forces and loads made him stop and test the joints himself, which was the part I didn't expect. Eleven models should keep him busy for a while.