This article describes a hands-on science curriculum used to teach kindergarten students about decomposition at the Riverdale Country School in the Bronx, New York. The goal was to get students to spend more time in the natural world and to have the opportunity to literally "get their hands dirty." This was premised on the idea that the more time students spent with nature, developing an understanding of its science, the more they would appreciate, respect, and nurture it. Information is provided on the development of an indoor-outdoor classroom that featured access to a vegetable garden and promoted nature walks. Particular attention is given to activity programs that included monitoring the decomposition rate of a pumpkin, studying vermicomposting, and studying seeds. Tips are also presented on teaching this curriculum even if there is no backyard. The activities are appropriate for K-3 but can be adapted for older grades as well.