Mini bike building is a growing community. Just take a look at the Redditor who made a mini bike using just Harbor Freight tools. Thene there's the Mega Moto 212, which has been an industry mainstay.
If your kid is a motorbike enthusiast, then you will probably want to get him/her a safe and powerful bike. With so many models in the industry to choose from, you may end up getting the wrong bike.
There used to be a time when the term "mini bike" would mean a simple thing. A small motorcycle that featured a small lawn-mower-derived engine, bolted onto a simple frame and transmission. They were ...