Engino 發現 STEM：牛頓定律 慣性、動能與位能定律套裝 適合 9 歲以上兒童 (可組裝 8 種模型)

My 10-year-old loved building the catapult and seeing potential energy in action. The instructions were clear and the pieces fit together well. Great hands-on way to learn Newton's laws.

Bought this for my 9-year-old and the catapult build was the winner — he spent an hour tweaking the angle to launch farther. The pieces snap together solidly, though a couple of the smaller connectors took some force. Eight models means it's still getting play weeks later.

The gravity fan model actually got my daughter asking why the blades kept spinning after the motor stopped, which turned into a whole talk about inertia. Instructions were clear enough that she built the moving cabin on her own in about 20 minutes.