I'm looking to get my 6 y/o a CRF50, and myself a XR/CRF100, so we can both putz around together... also may be looking into racing minis myself. The boy will be on a fiddy for a while, but I'm hoping the second bike will be something he can transition to later on. I just don't know if the jump from 50 to 100 will be too much; should I consider a XR/CRF80 for me to ride instead? Any other bikes to consider? He's been riding around a Razor MX350 for about 6 months, and is doing well on it. I'd like to see him progress to shifting, so I'm thinking the PW/JR50 are out. He's no where near ready for a full-on MX mini (i.e. KTM).