Get an up-close view of decomposing objects with the Now You See It, Now You Don't See-Through Compost Containers! Conduct side-by-side experiments in three separate containers: compare three of the same objects in different soils or 3 different objects in the same soil. Perfect for science fair projects. Details: 5.25" x 13" x 8" overall size Faux grass top and aeration holes 3 clear-view compartments with magnification spots Thermometers to chart temperature changes Introduces life cycles and composting For ages 4 and up