Reasons why they shouldn't:
1. They don't know how to drive them. 2. They may derail them. 3. They may anger the owner of the train. 4. They might mistake the self destruct button on some of them as an candy machine. 5. They would drive down a mountain and fall, and even get injured. 6. They would drive into a ravine and get injured, too. DON'T LET KIDS DRIVE TRAINS!
