kidobike / Bike

As the rise of environmental awareness, more and more people ride the bicycles to instead of public transportation. Parents choose the bicycle as a family activity. Learning to ride can make children improve balance and also get healthy. Children need the extra wheel for the first time who learning how to ride a bicycle. But if some days they grow up and don't need the extra wheel, then what should the extra wheel do? It’s better to make good use of it. If we can let the wheel integrate with bicycle, it will be more convenient, isn't?