It's a very humorous story of a safety-obsessed policeman who give safety speeches at schools, but no one listens until he gets a partner: Gloria the dog. Gloria acts out the safety tips behind Officer Buckle's back and makes learning safety fun for the kids.
They also got to play a game of Red Light, Green Light using a stoplight they made.
Unfortunately, during the weeks we were reading the book, Ezra got to make up a safety tip of his own:
"Don't run down the driveway!"
(seriously... he suggested it in the midst of me cleaning him up. :)