So, get this: some genius person living in Copenhagen had the incredible idea of building a special zone for children to learn the rules of the road. This place is meant to simulate the mean streets of the big city, except there aren't actual cars. This lets the kids get used to the feeling of biking around the city and teaches them important safety and traffic rules. Plus, the miniature set-up looks super cute.
Biking is a huge thing in Copenhagen. It's many people's mode of everyday transportation, and learning to ride bikes in the busy city is a right of passage for kids there.