You don't know what you're letting yourself in for, my friend.
Young Billy (aka The Wizz) in our club, did the Great Yorkshire Bike Ride at 8, Wetherby-Filey 70 miles. He did flag a bit in the last 10 miles, tho'.
He also did La Marmotte in '07 in 1hr. 20 minutes, age 11. Which was 5 minutes faster than 2 senior members of a Huddersfield club ;o)
'Orrible child.
We're a Go-Ride club, by the way and we answer all enquiries - phone/email/letter/man in loincloth with message in a cleft stick.
Oh, by the way, Islabikes, Islabikes, Islabikes, Islabikes.
Did I mention Islabikes?
Good luck and welcome to the world of seeing kids' delight in riding a bike.
Do enquire about a second mortgage, tho'. There'll be 'cross bikes, mountain bikes, road bikes, bmx, track bikes and .....
(Every other year or so, although my cousin did grow 13" in one year. thank goodness his hobby was playing the flute)