It seems that there is no simpler invention in the world. There is even an expression “Don’t reinvent the wheel”, in Russian it sounds like “Don’t reinvent the bicycle”. It means don’t invent (or say) something that is well known to everyone. But for a long time people did without wheels and bicycles, of course.
It is believed that the Ural blacksmith Yefim Artamonov built the world’s first bicycle with pedals and steering wheel in 1801. From the Urals, he came to Moscow and his bike appeared in the royal museum of rarities and… was forgotten. But until now, there are disputes, whether this event is real or just a historical tale.
In 1815 the German Baron Karl von Dreze invented a device which he called “machine for running”. It looked like a two-wheeled scooter with the steering wheel and without pedals, with wooden frame and could have a good speed for that time. People were delighted!