Is it advisable to organize school events for elementary students that involve making gifts for mothers and distributing them before March 21st (known as Mother's Day), with the aim of drawing attention to the innovated nature of celebrating this day?

There is no harm in helping children prepare banners to highlight the virtues of the mother on the day of the celebration of "Mother's Day," for every action that closes a door to evil is desirable in Islamic law. It is important to educate children that kindness to the mother and honoring her is required at all times, not just on a specific day of the year.