Valentines Day activities: I Love You To Pieces! Generic, so that it can also be made for Mothers Day, Fathers Day, Grandparents Day too. Wonderful fine motor skill that strengthens those finger muscles.
Have a square of tape on the ground, do a version of the hokey pokey. Have the students jump in and out of the square, walk to the right around the square, etc. This would be a good large motor activity to get preschoolers moving about.
Mailboxes for each family member - write notes to each other. Great practice for early writers! Also can do it for Valentine's Day and Christmas. Kids can discover surprises in their mailboxes from mom/dad and siblings