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.Ages 5+/Grades K+Features & Benefits:- Includes 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- Teacher's guide with usage ideas, time lines, and science fair applications