Thumb Tack Pumpkins Published October 23, 2014 at 495 × 450 in 18 Ways to Decorate a Pumpkin Without Carving it Tack or pin your pumpkin: You’d be surprised at the effect over-lapping thumb tacks can have. To jazz up the design, throw in some ball-end straight pins for color. Image courtesy of Bobvila.com.