Noah's Arc: The story of mass murder you gotta love?

When people talk about the story (as opposed to what really happened) of Noah's Arc I can't help but wonder how this story of mass devastation and murder is a children's story. The flood not only killed adults ("the wicked") bu what about new born babies, puppies and other completely innocent people! You would think an all powerful all knowing god would be a little more surgical! So god kills every smiley happy baby, every little boy skipping stones on a pond and every little girl picking flowers in order to kill a few "wicked" adults. How people can celebrate this story I have not idea, it's simply sick.