While it might not be as effective as a rain gutter, a paper towel or toilet paper tube can get the job done for simple cable management behind your desk. All you have to do is cut the tube open ...

A small image of the sun, about ½ cm in diameter can be seen projected on the white ... the house, tube viewers can be made using cardboard tubes from household items like paper towels or toilet ...

A small image of the sun, about ½ cm in diameter can be seen projected on the white ... the house, tube viewers can be made using cardboard tubes from household items like paper towels or toilet ...