One way to start talking about Allah with children is to remind them about the qualities of Allah Most High. Remind your child about Allah at different times of the day. For example, start to teach him the du'a before going to bed and after waking up. Teach him the du'a before eating and after eating. Teach him the du'a after leaving the house and when traveling in the car. You can help your child understand the meanings of each of these du'a. Basically, the idea is show your child through the du'a that Allah is in control of everything, all the time. Allah gives us our food, grants us sleep when we are tired, and keeps us safe when we travel.
You should not worry about whether or not your son is fully convinced with your explanations. Over time, just get your son to identify himself as Muslim, realize the beauty of Islam, and to love Allah, the Messenger, and his (your son's) parents. And Allah knows best.
You should not worry about whether or not your son is fully convinced with your explanations. Over time, just get your son to identify himself as Muslim, realize the beauty of Islam, and to love Allah, the Messenger, and his (your son's) parents. And Allah knows best.