I don't usually recommend papillons for kids. There is a certain level of error that is allowed with larger/heavier boned breeds of dogs that just doesn't work with a papillon. Kids are clumsy, kids do things without thinking through all the consequences, and I've seen too many pet papillons pay the more severe price of that thinking than a dog of heavier bone would.
That said with the right family where the parents were doing 90% of the dog raising I don't see it being a problem having the kid handle. I just don't see them as a kid's dog.