Imagine if this wasn't an experiment and these kids put themselves in danger? Good thing it was an experiment. This social experimenter goes up to parents at parks and asks if they think their child would take candy from him and if he could try and give them candy. Of course, the candy was fine but the logic behind it was very smart.

These kids gladly take candy even after he states, "But I'm a stranger. You take candy from strangers?." Parents were appalled and had to reteach their kids about the dangers of strangers. Some kids even start befriending the stranger and play a nice game of catch with him. Moral of the story? Teach your kids all strangers are danger.