Mrs. McBloom, clean up your room!"For nearly fifty years, that's been the refrain of janitors, principals, and students who enter the chaos of Room Five. Now the beloved Mrs. McBloom-who has taught nearly everyone in the town of Up Yonder, even Principal Pumpernickel-is about to retire. Finally, she must clean up her classroom.But where to begin? Years of science experiments have left all kinds of critters hoppin' and cluckin' and flyin' around. Giant sunflowers droop over desks; vines with fat green beans climb the walls; and a full-grown apple tree grows smack-dab in the middle of the floor. There are more books stacked in Room Five than in the Up Yonder Library. And who knows what else lurks in the piles of papers or the lost-and-found box?