プログレッシブ和英中辞典(第4版)の解説
ほうび【褒美】
a reward ((for));〔賞〕a prize
手伝ってくれた褒美に時計を娘にやるつもりです
I mean to 「reward my daughter with a watch [give my daughter a watch as a reward] for helping me.
3等までは褒美が出る
Those who place first, second, and third will receive prizes.