ながらに
nagarani

Conjunction

1. while; during; performed in this condition

Usually Written in Kana
かれ子供 こどもながらにお かあさんを たすけるために一生 いっしょう懸命 けんめい はたらいた。
karewa kodomonagarani okāsan'o tasukeru tameni isshōkemmē hataraita.
Child as he was, he worked hard to help his mother.