In this rhyming book for toddlers, Daddy urges his baby to "climb up Mama Mountain." As Mommy sleeps (or pretends to) in her cozy bed, Baby navigates all kinds of obstacles, from piggy toes to knees to elbows. Finally Baby reaches the top, where he is rewarded with a squeeze and a giggle. It's time to wake up, Mama! No more rest! Baby wake-ups are the best!