Two naughty babies, a zebra and a hippo, get in trouble when they persist in playing instead of going to sleep.
- ISBN10 0375813594
- ISBN13 9780375813597
- Publish Date 12 June 2001
- Publish Status Out of Stock
- Publish Country US
- Imprint Alfred A. Knopf Books for Young Readers
- Edition American ed.
- Format Hardcover
- Language English