This idea is all over the blog world. With good reason, it's a fun one. I picked up a white shower curtain at the dollar store and laid it out on the floor. I taped two markers to a water bottle to make the roads. I turned the kids loose with a box of sharpies.... mistake? I was a little concerned, but they were in their jammies so I wasn't too worried. We added their favorite shops, parks, and neighbors. I raided the recycling box and found some oatmeal containers and we turned those into tunnels. The kids played for some time... enough time for me to pack a few boxes.