A man bought a robot car. He was excited to try out the new car. That day, his wife was tired and didn't want to pick up the kids from school, so the man decided to try out the robot car. He said, ""Car, go bring my children from school."" The car left and didn't return for a while. Feeling worried, they walked outside and saw the car returning. It stopped in front of the house, and it was filled with many kids, but their children were not there. ""These are all your kids?!"" The wife said, furious. The man replied, ""Can you first explain why our kids are not in the car?""