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A simple machine for kids makes work easier. This warm guide explains levers, pulleys, ramps, and more with quick demos, safe tips, and short history notes for curious little hands. STEMアクティビティ

シンプルマシン: レバー、滑車、ランプの親向けガイド

子供向けのシンプルマシンは作業を簡単にし…

Roshni Sawhny

Roshni Sawhny

4月 3, 2026 •
1 分で読める

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