If he is BMX mad, maybe that is his sport. Has he really shown any interest in wanting a trials bike?

I guess his son could always be an acception... but I don't know a single guy who didn't want a bike when they were growing up! Who doesn't love motorcycles!! But true, I see what you mean! However, he will soon realize pedaling isn't as fun as using something with an engine I'm sure!

my son, now 11, went from a year on a ty80 - enjoyed it enormously, did v well in trials etc, to a gasgas rookie this winter. he has found the jump in size quite intimidating. My elder boy looked huge when he rode the ty80 when he was 12. Soo, I would not recommend the ty80 for an 11 year old - clearly the only other option is a full-size junior bike. If he hasn't ridden the small ty80 then he won't find the modern junior bike large. Perhaps a Whitehawk would be a good alternative - nope on reflection, go for a 'modern' 70/80cc bike. that's it, my final answer.