In The Berenstain Bears That's So Rude! by Mike Berenstain, Sister Bear woke up on the wrong side of the bed and her grumpiness quickly spreads through the family! First Sister is being rude, and then Brother quickly follows suit. But Mama Bear is there to set the whole Bear family straight as they all learn an important lesson about being polite and kind to one another. Recommended for ages 4 to 8 years.