I designed and built for my two grandsons two different rocking motorbikes. One has a straightforward rigid handlebar, whereas the second one can be steered via a spring-loaded handlebar. Since I had to ship them from Canada to the southern USA, they are built in sections that can be easily packaged and assembled. They endured and withstood the rough riding by the owners for several years and are now kept as heirlooms. – Dieter Katz, Woodbridge, Ontario, Canada