の手の届かない所に

out of reach of

→ の
phrase Rare #24,269
out of reach of Used to say that something should be kept where a person or animal cannot reach it. の marks whose reach is being referred to; 所 means “place.”
JA: 貴重品は子供の手の届かない所に保管してください。
EN: Please keep valuables out of children's reach.

それを子供たちの手の届かない所に置きなさい

Keep it out of the children's reach.

薬は子供の手の届かない所に置いてください

Keep medicines out of reach of children.

彼女は薬を子供の手の届かない所に置いた

She put all the medicine out of the children's reach.

その薬は幼児の手の届かない所に置きなさい

Keep that medicine out of the reach of young children.