Not content with a simple knife, our son used an electric dremel tool to draw a goose on his pumpkin. He wanted something that would cut most of the way, but not all the way, through, so it would look translucent. Now that's dedication to his art! Note the contrast with the guy in the background, who looks like he's murdering his pumpkin with a machete (we were at a pumpkin carving party for graduate students in my department).