Gareth has an imaginary city. It's populated mostly by green dogs, with an ethnic minority of red lions, and it's usually on Mars, except when it's in our kitchen. "Hooray!" Gareth declares. "We have arrived at Woof Woof!" The other day, he climbed into the driver's seat of Dan's car and started pushing buttons. Where was he trying to drive to? Woof Woof, of course. "All the way to Woof Woof!" When he builds models of Woof Woof with his Mega Blocks, he separates out the red ones. Woof Woof, being on Mars, is a red city. I have it on good authority that a faithful representation of Woof Woofian architecture will require that I buy more red Mega Blocks.