DIY Sifting Tray Litter Box

Make an enclosed litter box with a rotating tray to sifts the litter! Get several disposable baking pans. Draw lines of dots over the base of one pan, and use three colors of markers to draw a circle around each dot to create three different patterns for the holes. Put an unmarked pan under the marked pan, punch through all the holes that are one color, then replace the bottom pan with a new one and punch the holes for a different color. Continue until you have three pans, each with a different pattern of holes in the bottom. Put the pans in a plastic storage bin, cut out a doorway hole from one side of the bin, and sand the cut edges of the plastic smooth. Fill the pans with litter. To clean the pan, lift the top one up to allow the litter to sift out, dump out the litter clumps, then put it on the bottom of the pan pile.