Colorado has some of the gnarliest skateparks in the world, giant concrete behemoths packed with everything a skateboarder could ask for. So why do those stubborn street urchins still slide and grind on every little ledge in the city? Aurora's new pocket-sized park, designed and built by the skatepark experts at Grindline (a Seattle-based company better known for building bigger, burlier bowls) officially opened in February and probably won't do much to keep kids off the streets, but its handful of small ledges, manual pads and a simple banked feature are already attracting skaters from all over the metro area — proof that bigger isn't necessarily better.