This is the 52nd most frequent Hebrew word.
להם
"Them" or "to them."
In this sentence, 'להם' translates to 'to them' and indicates the recipient of the verb 'brought'.
הבאתי להם מתנה.
I brought them a gift.
Here, 'להם' means 'to them' and is part of the phrase 'יש להם' which translates to 'they have', indicating possession.
שאלתי אותם אם יש להם את המפתח.
I asked them if they have the key.
In this instance, 'להם' means 'to them' and refers to the indirect object of the verb 'allowed' indicating who was permitted (the children).