Broomfield's swanky Paul Derda Recreation Center has the answer to all those crummy winter days when the little ones are going stir-crazy — courtesy of its indoor playground. We're not talking about some lousy jungle gym. Think a McDonald's PlayPlace on steroids: a multi-story climbing structure, a labyrinth of rope ladders and fun-house tunnels, even tandem super-long slides. Best of all, you don't need to throw down for a Happy Meal, because the whole thing is free for families. And since it's all swathed in safety padding, the only tears you'll see are the ones that start when you tell them it's time to go home.