But I am pondering the notion of allowing them to build a cob dome, rather like our cob oven, and make it look like an igloo. Cob is a dirt-cheap construction material, made of nothing but clay, sand, and straw. I have plenty of straw, which I get for free from pumpkin patches in early November. It is a habit for me now to scan craigslist for "straw" the week after Halloween. Clay is available for the digging - our subsoil (only about one foot down, two at the most) is almost nothing BUT clay. So all I would have to buy is sand, and that's pretty cheap. Might even be able to get it free once the rain stops and people want to be rid of their sandbags.
Something tells me, however, that if I let the kids do their own cob project, what they come up with will not end up looking like an igloo, no matter how much Michael proclaims that is what he wants (with a hole in the roof, no less, "so we can make a fire and have the smoke go right up!") No, I'm thinking a building project of theirs, besides being remarkably messy, wouldl end up more like this.
Perhaps the tactile nature of the building process, not to mention the necessary planning involved, would be good for an ADD kid. Or perhaps they would abandon it in the middle and leave me to finish it (not likely) or attack it with a pressure hose to reduce it back to a heap of dirt.
I continue to ponder the possibility.