If you live in the city and don't have a yard or driveway, you go to the park to play outside. Instead of buying toys and then having to bring them everywhere, why not rent them there?

They have bikes too, but the kids seemed to be having more fun with the cars. They are pedal powered, with a chain running from the front seat to the back. A lever pushes a pad against the right rear tire as a brake:

These care are sturdy and made of easily reparable metal to stand up to the intensive use they get. Plastic cars like children might have in the US wear out rapidly. Which doesn't mean they can't be used, just that they need some modification: