toy; plaything (an object for children to play with)
子どもたちがおもちゃで楽しそうに遊んでいる。
The children are happily playing with their toys.
おもちゃ売り場で新刊の人形を見つけた。
I found a newly released doll in the toy section.
そのロボットは子ども向けのおもちゃだ。
That robot is a toy for children.
(a) plaything; someone/something treated as a toy (i.e., toyed with or manipulated)
彼は相手の感情をおもちゃにしてはいけない。
You shouldn't toy with someone's feelings.
権力をおもちゃにして、好き勝手に振る舞った。
He treated power like a toy and acted as he pleased.