What do you call a school bus driver that cannot walk? A silly school bus driver!
Silly School Bus Driver
Explanation
Explain Bear
Listen up, buttercup! The joke is that the school bus driver can't walk, so they're "silly," which sounds like "wheelie." Wheelies are what wheelchairs have, and you sit in a wheelchair when you can't walk. Ha! Bet your brain feels like it did a marathon, huh?