Here is a cat hammock you can mount to your windows to make life more fun for your kitties. The KAMY’s ZOO Felted Cat Window Hammock comes with 4 suction cups and holds up to 40lbs of weight. It has 10.5 x 14.6 x 7.3″ of space inside to accommodate small to medium size cats.
You can clean this hammock with a dry cloth or soft sponge with water & soap. The KAMY’s ZOO Window Hammock keeps your kitties comfortable and gives them a nice view of outside. Costs under $40 at this time.