Back when we lived in SoMa, we would take Elliot to an indoor toddler play area called Recess. Directly across the street was a dog "free play" facility called Muttley Crew.
It was always my wish that the dog lovers and the kid lovers would come out to the street for some kind of Jets-vs.-Sharks dance-off ["kid lovers" is maybe not the best phrasing -ed.].
That never happened, but a new show on Animal Planet may be the next best thing: "Puppies vs. Babies."
Having no dog, I think I need to root for the humans.