For Valentines last year, when my daughter was just 19 months, we set up a simple, fun surprise for her to wake up to. I cut out hearts and wrote the names of people that love her on them, like Mama, Daddy, Papa, and so on. I scattered them going down the stairs and led her on a path to her Valentine's treat, a heart full of Skittles. We love skittles because they have an S on them for Serenity. Oh, and they are full of sugar. =) I was happy to discover she recognized some of the names and was thrilled to find them!
This year, I think I'll do a variation of this. Maybe find wooden hearts that I can paint the names on so that she can add them to her crazy pink tree. I'll be sure to post what I decide to do!