Our German friends let us borrow their son's bike after he got too big for it. I guess it will still be called a "bike" because it has two wheels.
See. No pedals. We don't need no stinkin pedals. Really, this is a great way for kids to learn how to ride. They just start off kind of walking while sitting on it. As they go faster, they kind of get the hang of how to not fall over. As I have said before, this is counter intuitive - if you are falling to the right, turn to the right.
I don't know if you can get a bike like this in the U.S., maybe you just need to find a German friend. If…