Etiquette dictates that all Bat Mitzvah guests bring gifts for the girl of honor. Gifts of money are always appropriate. Give an amount that is an increment of 18, which holds significance in Judaism. Alternatively, pick out a piece of jewelry or a gift that appeals to the girl's interests.
Choose a bracelet or necklace with a Star of David, or select a simple piece of beaded jewelry that the girl can wear every day.
Gift cards, picture frames and books are all appropriate gifts.
Typically, the family hosting the event sets up a gift table at the reception. Place the gift there or hand it directly to the girl or her parents.