There's something a little inelegant about covering your gifts with odd bits of tape. It's quite literally the rough duct tape solution to wrapping presents. If you don't have any tape or ribbon want to avoid a tacky aesthetic, this Japanese method can keep your presents wrapped sans sticky tape.
This will only work with boxes, and it will probably take a few tries, but it's otherwise relatively simple. You really need to see it done to understand the required folds so check out the video and get wrapping.
Japan Gift Wrap Hack [No Tape, No Ribbon] [BeatTheBush]