I love taking candid photos of people and I think children make lovely photos when they are acting so naturally as this little girl was. She looks as though she's really concentrating. I don't think her parents saw me taking it as you do have to be so careful when photographing children.
You do have to be careful Rosie but they do make great subjects. In the past, I have shown the parents and asked if I could keep it or if they want me to delete it. Most are happy.