Those are the prime requisites for..
a nascent World-class Motocross rider!
ie. keep him Away from any fantasy-glorifications of those who do this !!
(In fact they are aerialists, as they spend more time airborne than on 'ground', merely richocheting-off successive launch points.)
All the Pros started out on mini-wheels at oh.. age 4ish? And having never known real Pain:
fearlessness follows.
(Of course, I have no idea How you keep-him-away from the pretty airborne pix + the power attached to that twistgrip) so ... Luck! y'hear?
'Course, just maybe ... with a burka made from the new magic-silly-putty .?. .?.