It's a Do-It-Yourself project about how to make a bow for your guitar. This bow costs nothing, but allows you to expand the possibilities of the sound of the guitar. I can't say that your guitar will sound exactly like a violin or cello, but the sound will be closer to these music instruments than to a regular acoustic guitar.
To make a guitar bow you will need: wooden ruler, cable tie, binder clip and regular sewing thread. And don't forget to rub the thread with rosin. You can use special rosin for violin or cello bows, or you can use rosin for soldering.
"V" shape of the bow allows you to insert this bow between two strings and play with both sides. And if you push it deeper, you can play on two strings at the same time.
By the way, if you come up with a way to play with a bow on an electric guitar, be sure to write about it in the comments.