First I had to share this picture of my daughter in her preschool class. They do the classic Ice-Cream party where you collect every imaginable horribly sweet junk food you can find and let the kids make their own sundaes!
As for my class with my energetic 2 year old's I started the morning with heart shaving cream trays!
We read lots of cute books which I really should have taken a picture of but I remember one was Corduroy's Valentine's Day and another one was Elmo's Fuzzy Valentine. Cute books and age appropriate. And we did too much art to explain but the one I wanted to share was this VERY simple idea for a card from your little one:
Make their hand prints where their thumbs face down and their pointer fingers almost touch and you will have a heart shape in the middle!! I glued a heart in the space to make sure the parents saw the heart shape. This would be easy to do for grandparents or aunts and uncles and pop it in the mail. This was a SIMPLE version but you could really jazz it up some and make it look even nicer. Happy crafting!