A bicycle comes to life because a mad scientist decided that was a reasonable solution to a traffic safety problem. The show's entire logic is that simple, that absurd, that perfectly committed to its own nonsense. It's a special that treats a PSA about crossing the street like the setup for a punchline that lasts seven minutes, which is exactly what Dr. Slump is built for: adults who remember when educational cartoons had the courage to be genuinely funny instead of patronizing. The real hit is watching Arale's world operate on dream logic where danger is just another prop in an endless pile of gags.
The gang heads out for a picnic on a Sunday morning, and Arale nearly gets hit when she steps into the street without looking. Senbei comes up with a rice machine that can bring pictures to life, and one of the pictures turns into a bicycle. Tarou and Akane land in trouble for their reckless riding. The next day everyone goes to school, but Tarou ignores what he was taught the day before and speeds through an intersection, crashing into a truck. The one-episode special pairs comedy and sci-fi gags with a lesson on traffic safety.