That is fantastic! And exactly why I don't want to crap on his ideas. Because what do I know? Maybe his huge, over the top ideas will turn into something both real and incredible. I don't want him to be afraid to think big.
SweetSilver, that is intimidating, but I think I could even jump on board with the fair thing (though probably on a smaller scale than they're imagining), or even a huge teen campout. Those are at least physically possible, and they are starting and moving forward with the idea on their own, so maybe they will come up with creative ways to get around whatever problems lay in front of them, which is always awesome. I was so up for helping him with his hot chocolate stand and being editor for the weekly newspaper he made a couple of issues for before quitting.
The ideas that both impress me and make me a little berserk are the ones where he wants to build something like a portal to another dimension, or an actual working TARDIS...
Also on my list of don't-even-get-me-started: a full sized pirate ship that would be a playground but also functioning so we could sail it in the tiny lake at the park across the street, to be built in a single weekend, no less; an x-wing; and a network of secret tunnels and passageways throughout the house. (I believe we discussed digging the tunnels to some of our favorite spots in town as well, so we wouldn't have to cross busy streets anymore.) Now, I take on some ambitious DIY projects, but I do have limits on what I am capable of!