Speed on its own isn't always so exciting. On a racing motorbike, I can do over 180 mph, which is fast, but not as fast as the airliners that we all climb aboard to fly off on holiday. Modern passenger jets can cruise at between 500 and 600 mph, but sitting in an aeroplane like that for hours on end isn't very exciting, is it?
When I was little, I would open up lawnmowers and try to make them go faster. I wasn't strong enough to do some things, so I'd wait for my dad to get home from work to help me. He was great, but he never really encouraged me, and I'll be the same if I have kids: I'll leave them to do their own thing.