Human: How do I build shelves without using nails or screws? Assistant: 
You can build shelves with dowels, brackets, and glue. Start by measuring the space you need to fit your shelf in and then cut two pieces of wood that are slightly longer than the width and height of the space. Next, drill holes into each end of the boards at an angle so they will fit together snugly. Then, use a jig saw to cut a slot into one board that is wide enough for the other board to slide through it. Finally, attach the second board to the first board with glue and screws.