I'm room parent for my first grader. The only thing I can come up with are heart shaped balloons and doing a photo-op for the parents to get an 8X10 of their kid... I'm lost! I don't know what else to do!
I have done the game hot potato using a stuffed heart or lip. I also did pin the arrow on cupid. You could also have heart shaped cookies and let kids decorate them. Also you could do a Valentine's bingo and use conversation hearts to cover the squares. I found my templates online.