Kids that have a large backyard area to plant a fruit and vegetable garden need to build the soil to create garden beds. Kids can submit soil tests to a laboratory in the fall to discover what amendments their soil needs. Kids can do sheet mulching or lasagna gardening in the fall by spreading raw, uncomposted organic materials directly onto the soil, making the entire garden area a layered compost pile. Sheet composting can also be done in raised bed gardens and in community gardens to build the perfect soil. The mulch suppresses weeds and retains water in the soil. Kids can build up alternating layers of brown and green materials, each 2 to 6 inches thick, for a total sheet-mulch depth of 12 to 18 inches. If the backyard is covered with grass, kids can put a layer of wet and overlapping cardboard on top of the grass. Kids can add layers of organic compost, shredded yard pruning materials, kitchen scraps, shredded leaves, grass clippings, while watering each layer. The layer of raw kitchen scraps should be covered with several inches of dried leaves, newspaper, cardboard, or sawdust to prevent pests and odor. Kids can top it with wheat straw for the layers to decompose over the winter and become new topsoil for spring planting.