On Instructables, the Papier Boy shows us how he turned store-bought garden gnomes into Spidergnome, Batgnome and Rob-gnome:
Evil lurks in the shadows of our backyards. Rogue snails. Radioactive skunks. My yard has a maniacal possum that will stop at nothing until he controls the entire area behind the compost pile. That's why every backyard needs a hero. One that can clean up the garden and make it safe for all law abiding neighborhood critters. This Instructable will show you how to turn an unassuming mild-mannered garden gnome into a tiny butt-kicking purveyor of justice.