Hi this is a jet pack I built for my 8 year old. I use a tutorial from TK-409's site. The tutorial is to fit a 4 year old so I had to modify it a lot. I also made it strong. The first one I built him I did on the fly right before C3 and it kept falling apart. Any way I did learn a lot from this one and there are a lot of mistakes in it but it will work for the little guy untill he needs a bigger one.