One of Junie B. Jones’s top front teeth is loose, but Junie B. is not that thrilled about this development because what if she looks like toothless Uncle Lou? And even worse – what’s all this tooth fairy business? Meanwhile, that meanie Jim has invited everyone in Room Nine to his birthday party on Saturday except Junie B. Should she have her own birthday party six months early and not invite Jim? Or should she move to It’s a Small World After All in Disneyland?