After her first contact with a Department of Homeland Security agent, an Oregon toy store owner thought she might be the victim of a prank caller. But a second cryptic call left Stephanie Cox shaky. When the feds descended on Pufferbelly Toys, they showed their badges and made their mission clear: They were investigating a report that she was selling a toy called the Magic Cube, which they said was an illegal knockoff of Rubik’s Cube. Cox removed the offending item from the shelf, then contacted the manufacturer, who assured her there was no patent violation. Now, with the Magic Cube back on the shelf, Cox still puzzles over her Homeland Security experience. “Aren’t there any terrorists out there?” she asked.