Question for anyone who has been on Sky Trek with kids - their website says the minimum age is 8. Can an 8 year old really handle this? It's not fear I'm worried about, obviously that varies kid to kid and I can just ask my kids (and am pretty sure they'll want to do it). I'm more concerned about them being able to physically handle the brakes, etc. My son will be 8 1/2 when we're there but is a little over 4 feet tall and weighs just 50 lbs. Has anyone done this with an 8 year old? Thanks!