Basically, she lays out two or more blankets, then arranges neat piles of every toy, doll, and stuffed animal (dress-ups too on this day) she can reach. I still don't know why this arrangement defines a party in her mind, but it does.
Every day I plead with her not to make a party. She then promises me so convincingly that she will clean it all up when she's done, all by herself. I can't believe I fell for it way too many times. Ian doesn't mind though.
Someone knows her birthday is right around the corner.