My 3 oldest kids are really into mazes, very complicated nearly impossible mazes. I think this love stemmed from the book "Monumental Mazes" by Richard Burnie (which I confess I bought because I thought it was too cool). This maze madness has spilled over into drawing their own monumental, 20x36" size mazes for mom and dad to figure out. They include trap doors, fishing piers, secret passages, caves, and more. Often, they are impossible to complete, but the fun is in the creating.
Right now they're busy making another monumental maze, but my oldest son just told me that I'm in luck today. This maze isn't for me - it's for Dad because he's smarter. Well. Hmm. They sure know how to push mom's competition buttons!