I got my dh some Craftsman tools. They have red handles, so I just tied them up with some red ribbon. He also got a handmade card - I always make my own!
I got my dd a bunch of cute bath products from the dollar bin at Target. They had the cutest Valentines stuff and gift bags. I think everything cost me around $6.
I didn't get anything for the boys. They don't have a clue about V-day!