Age range 0 to 3 8 little planets with the sun at the center, each one wishing it were a little bit better... Old slow Neptune felt he was behind. 165 years to circle the sun is an awful long time. But the 8th little planet didn’t need to worry. It spins on its axis in a really big hurry! To the tune of “Ten Little Monkeys Jumping on the Bed” comes a new bedtime story from bestselling author Chris Ferrie that’s sure to get little ones excited about the solar system while learning new facts about each planet!