Simple fact is, if you want a console for kids its the Wii (or even Wii U if you really have to be one of the 6 people who own one).
The PS4 and XBone will be equal to eachother as far as kid related titles go, once the library is bigger for both.
At the moment you have things like Lego Marvel, Need For Speed and a couple of other games that are cross platform to the extent that they are on the last gen as well. The only game I can think of right now thats PS4 exclusive that would fit the bill is Knack, and most reviews are slating it.
As for the Xbone, no idea.
