"I'm climbing up!" said Fluff. "I'm climbing up!" said Billy. "I'm sliding down!" said Fluff. "I'm sliding down!" said Billy.   Meet Fluff and Billy, two of the most irresistible, adorable penguins ever. They're best friends, and whatever Fluff does, little Billy does too: climb, slide, swim, splash, run, and jump. Together, they have fun in their enchanting polar world--until something happens that rocks their friendship.   Children--and parents too--will instantly recognize and relate to this familiar situation, and rejoice in how the penguin pals resolve their conflict.