I think that the
real use of this" trike-to-bike" will be for the disabled!
Think about it...many people "with a disability" may be able to balance on two wheels when they are "at speed", but
cannot at very slow speeds or when stopped. This rig would solve the problem!!
As for able-bodied children, the
thing may be more useful to calm parents' often very irrational fears than as a teaching aid for the
kid.
Skinned knees are
very useful reminders that balance
is important...and that falling is NOT the end of the world...and to get over fear and trepidation (most useful when one gets to the point of riding in traffic, indeed.).