I found these two litter box hacks on IKEA Hacker. The first one is my favorite IKEA hack so far. Romina and her husband, who are both architects with an eye for modern design, made this beautiful litter box concealer with a Besta shelf unit and the Capita legs. By simply cutting the middle vertical panel in half, they created a pass-through for the cats to enter and exit their private litter box area. Well done!
The second litter box hack is nice, too. It uses a wooden storage bench with only the front panel of the drawer and a cute kitty face cut for the entrance.
Get all the details over on IKEA Hacker.