Well, it all depends on how you define "children's", really. The Lion, the Witch, and the Wardrobe? Harry Potter and the Prisoner of Azkaban? Oh the Places You'll Go?
I'm afraid that some times
you'll play lonely games too.
Games you can't win
'cause you'll play against you.
[...]
And will you succeed?
Yes! You will, indeed!
(98 and 3/4 percent guaranteed.)
KID, YOU'LL MOVE MOUNTAINS!
Yeah, let's go with the Seuss here. For given values of "favorite", anyway...