Three separate, aerated compartments enable kids to view the entire decomposition process clearly and make side-by-side comparisons between different materials. Included thermometers demonstrate temperature changes during decomposition process. Includes a 12"W x 4"D x 8"H clear plastic box with faux grass top, 3-clear-view compartments with aeration holes and magnification spots, and thermometers. Teaches decomposition, composting, life cycles and environmental education. Teachers guide with usage ideas, time lines and science fair applications included. Grades K+.