Two slides side-by-side means you can run slide races. First, you need double-slides, like the ones at the playground at Wolf Creek Park. Then you need an impartial referee to ensure the race is fair — so you enlist your dad Camron DeWitt, at left, making sure everyone is lined up properly. And then you need your competitors: sisters Macy DeWitt, age 2, at center, and Alice DeWitt, 4, at righ...