Just wondering if anyone else is as interested in these as I am. I saw one on Amazon.com and immediately thought "FERRET TUNNEL X 9000!"
From the dimensions, it seems like an adult could possibly fit into them, too. Well, a thin adult.
Amazon.com: Mega Playland: Toys & Games
That's an example of what I'm talking about, although those connect playhouses. I'd love to play in something like that...it fits my weaselly little self to a T. What makes them doubly cool is that they fold up so they can be put away.