On the stranger danger issue, we kept it very simple at that age. 1) Never go with anyone unless mom or dad know that you are going --even if it is someone you know. 2) If you look up and mom or dad isn't with you, go back to the last place that you saw us and we will too. 2) If you still can't find mom/dad, ask another mom for help but don't leave with that mom, stay put. (the look for another mom suggestion came from "Protecting the Gift") Kids gifted or not don't always completely get who is a stranger, i.e. I always talks to the cashier at our local market and that cashier knows my kids' names but I still would consider that person a stranger -- a 4 year old might not. As they have increased in age, we have expanded the conversation based on situations that have come up in every day life.
