Your child will learn with the experience offered by Grow Fly Traps without soil! The Hydro-Pump keeps the water fresh and the nutrients available to the roots of your growing plants. Each kit also includes a growing dome, hydroponic rack, 4 net pots, 4 rock-wool cubes, a fly trap seed pack, 3 color decals, 2 types of nutrients, and growing and care instructions. Hydroponics is the method of growing plants without soil, with plant roots suspended in a simple medium containing nutrients and water. Using hydroponics, the roots are better exposed to nutrients and oxygen, which stimulates root growth. Home gardeners have recognized hydroponics for year-round, pest-free gardening.