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Toilets for People is on a mission to deliver cheap, hygienic toilets all over the world. At World Maker Faire, representative Jason Kass showed host Katie Linendoll how one of these low-tech toilets—called a Compact Rotating Aerobic Pollution Prevention Excreta Reducer, or or C.R.A.P.P.E.R. for short—works.

Popular Science checked out the most amazing, innovative, and crazy projects at the 2015 World Maker Faire in New York City. Watch our complete coverage here. You can hear more from Katie on her podcast.