The goal is to inspire young children while teaching the importance of paying attention at all times.
Do you pay attention to your surroundings? If not, it is very important that you do so. Billy, Jimmy and Malcolm didn't pay attention nor listened to instructions very well. They should be aware of the recycle truck and all of the dangers of their surroundings. Their lack of attention taught them the importance of paying attention to their surroundings at all times. Would a lack of attention cause them a ride to the recycling bin?