Amanda recommends The Princess and the Pony by Kate Beaton

This is one of my favorite books to read with rough-and-tumble kids. Princess Pinecone would LOVE to get a real warhorse for her birthday. And her family tries...but they don't quite get it right. What follows is a fun book for horse kids, brave kids, fantasy kids, and kids who are really good at looking at challenges in a new way.
Publisher's description:
Princess Pinecone would like a real war horse for her birthday, instead of which she gets a plump, cute pony--but sometimes cuteness can be a kind of weapon, especially in a fight with dodgeballs and spitballs and hairballs and squareballs.