The central gimmick of the show, praised by Microsoft mogul Bill Gates as "the first interactive TV show", was the use of a "magic drawing screen"—a piece of vinyl plastic that stuck to the television screen via static electricity. A kit containing the screen and various Winky Dink crayons could be purchased for 50 cents. At a climactic scene in every Winky Dink short film, Winky would arrive on a scene that contained a connect-the-dots picture that could be navigated only with the help of viewers. Winky Dink then would prompt the children at home to complete the picture, and the finished result would help him continue the story. Examples included drawing a bridge to cross a river, using an axe to chop down a tree, or creating a cage to trap a dangerous lion.