Be very careful. Modern views and attitudes can bring on some strange interpretations of what is and is not acceptable when photographing children and some of the most innocent of pictures are seen by some warped minds as being indecent and the photographer is hauled up before the beak.
Remember some years ago when some TV personality was "done" because the pictures of her kids in the bath were reported to the police by some busybody jobsworth in Boots photo processing department. That's just one example brought to our notice because the person concerned was well known but, it's happening all the time.
Part of my business involves taking pictures for commercial purpose. I make damned sure that all the people I use (adults and especially children) are professional models, with an agent and full legal release documents.