While she's in the Metropolitan Museum with her grandmother, a little girl leaves her prized yellow balloon tied to a railing outside. But its string becomes untied, and the balloon embarks on an uproarious journey through New York City. With an ever-increasing cast of wacky urban characters in tow, it soars past a host of landmarks. Eighteen famous paintings and sculptures are reproduced in this delightful, wordless book that explores the magical relationship between art and life.