age 4 e-balance bike - master that
then....
forget learning micro-route skills and finely-tuned balance on a hard tail ...just go straight to:
age 9
50 pound 140mm travel FS crash-through-eveything e-bike
then
forget cardio-vascular fitness, forget low BMI, straight to
age 18
65 pound 170mm travel FS crash-through-eveything e-bike
sigh.