I throw in Cheerios or popcorn to see if they know to vacuum that up rather than avoid it. I also run them over oatmeal and flour to see how well they pick up fine debris and have them tackle both thick and low-pile carpets. I watch to see how https://thejillist.com/story9741857/5-fatos-f%C3%A1ceis-sobre-top-3-automatic-vacuum-cleaners-descrito