It's not even a party. It's just a school day.
The best part: On the second page, inside Sister Bear's backpack, is a Valentine that says "My", a symbol of a heart, then a picture of a pair of pants, and then "4 You." Is that "My heart pants for you?" Who says that? That's just bizarre. "My heart shorts for you?" "...jeans for you?" None of those make any sense. It's next to one that's got a picture of a bee and then says "mine" underneath, obviously "Be mine." That's pretty common. Maybe just "My pants for you?" A bit direct for grade school, don't you think?