My little cousin is absolutely obsessed with construction equipment, to the point where his last birthday party was literally dump truck-themed and every present was, of course, a dump truck.
But, he's also five years old, so odds are it's going to be years before he ever finds himself operating the kind of machines he's currently obsessing over. That is, if his interests don't suddenly change dramatically before then.
For now, his life is all about construction stuff. And if this sounds like a kid in your life too, I think I've just found the perfect theme park to help them live out their machine-fueled dreams.