In this time and age, it is IMPERATIVE that we teach our children to beware of strangers.
1) Don't open the door to anyone who is not familiar
2) Don't get into a strangers car
3) Be careful of people who claim to be "friends" and who was very friendly
Remember a lot of this predators who prey on children appear very friendly and diarming to children. A lot of them cook up fantastic stories and some of them may have been observing your child's movements or activities . So sit your child down tonight, and have a heart to heart chat about the danger of strangers.