Covered round one with steps. https://www.amazon.com/Petmate-Booda-Clean-Litter-Colors/dp/B0002DH8KU/ref=asc_df_B0002DH8KU/?tag=hyprod-20&linkCode=df0&hvadid=167144421804&hvpos=&hvnetw=g&hvrand=5226198765826197962&hvpone=&hvptwo=&hvqmt=&hvdev=m&hvdvcmdl=&hvlocint=&hvlocphy=1028087&hvtargid=pla-279295399390&psc=1

Thanks so much for the advice, everyone. I am thinking of getting this one from Amazon. It seems to be rated well and would be easy for a kitten and a cat.