- ISBN: 9780679804192 | 0679804196
- Cover: Paperback
- Copyright: 3/17/1990
Sister Bear's first slumber party at Lizzy Bruin's gets out of hand with pillow fighting and soda squirting--and then Brother Bear and Cousin Freddy show up. Lizzy's parents have no choice but to end the party, and Brother and Sister receive a valuable lesson in behaving away from home.