I took the children to the park (in order)to let them play.
I took the children to the park so that they could play.
「〇〇を□□させるために~~した」は色々な英語の言い方があります。例えば、
I did ~ (in order) to let ~
(I took the children to the park (in order)to let them play.)
I did ~ so that ~ could ~
(I took the children to the park so that they could play.)
他にも似ている言い方があります。
The children wanted to play outside so I took them to the park.
(子供たちは外で遊びたかったから公園に連れて行ってあげた。)
I wanted the children to play outside so I took them to the park.
(子供たちに外で遊んでほしかったから公園に連れて行った。)
ボキャブラリー
children = 子供たち
play = 遊ぶ
park =公園
take = 連れて行く
let = ~させる
outside = 外