For girls who want to do extra work on weekends and make their kitchen chores easy, this might be the best idea. Not only for girls though, can men who love cooking also makes this easy to carry the wooden item to make cutting vegetables and fruits easy. This is a basic wooden cutting board for kitchen purpose, but it can save you a lot of extra pennies. I made this to my wife and she is using it very enthusiastically.
We cut the supports 16 in. long, but you can place the second shelf at whatever height you like. Screw the end supports to the walls at each end. Use drywall anchors if you can’t hit a stud. Then mark the position of the middle supports onto the top and bottom shelves with a square and drill 5/32-in. clearance holes through the shelves. Drive 1-5/8-in. screws through the shelf into the supports. You can apply this same concept to garage storage. See how to build double-decker garage storage shelves here.