french flirting begins at a young age

Last week I had dinner with someone who was in town for a few days. We ate in a small restaurant in the latin quarter and there was a group of people finishing their meal. There was a little boy around 5 or 6 years old with the group and after they left they stood outside chatting. While the adults were talking the little boy came back into the restaurant and tugged on the server's sleeve to get her attention and said "au revoir". After saying goodbye, he went to the door turned and called out "a toute a l'heure". Apparently this wasn't enough of a farewell because he then stood on the outside of the glass door, looked in and waved at her. No wonder the French have a reputation for being flirts, they start at such a young age...