When your kids come home with tiny houses covered in candy and glitter and then recite the tale of Hansel and Gretel, you know they've had fun. Add "free" to the list of benefits at Woodbury Library's ever-changing arts-and-crafts program, and you know why you're going to want to drop your progeny off there at 4:30 p.m. every Wednesday. Past projects have included making magnetic slime, paper LEGO figures and 3-D spiders, all ideas created by the Woodbury staff. While other Denver Public Library branches offer their own kids' programming, this one wrote the book on child's play.