OLIVER'S CARDBOARD GARAGE. for little cars, adapted from MissyInspired's blog. Instead of using duct tape, I used glue for the entire project for a cleaner look. The upper level, set on 2 toilet paper tubes (lots of glue to hold in place), is wide so a car can drive past parked cars, the ramp has sides, and doors are marked enter & exit. I also glued a piece of cardboard in the center bottom of the box to level it. He loves it! (thanks Missy). Less than an hour to build!