I guess that is what I have to look forward to. My son just turned 7 a month ago and can do some small doubles...about 2 feet of air. Your son looks a good 4-5 feet up! My son saw those pictures and of course now he wants to jump something...ANYTHING. We have a small "track" in our back yard and I have been considering putting in some jumps. How did you build them? Is it just dirt or is something underneath the dirt?