For any parent, the best time with kids is when they are little bit interactive (not just cute babies 🙂 ) and you have fun and playful times with them.
This story started when my son was 4 years old (he is currently 8 years old). The story actually started with my daughter as she was little more matured (was 6.5 at that time) at the time. However she did not stay with Tennis. She got into other fascinating things, probably a story for another blog 🙂
My son currently plays JDS under 10/11 tournaments and in my view he is doing very good for his age. But its a long road 🙂
The context here is of Australian tennis.