He recommends looking for a special concrete mix that is lightweight and has a small aggregate in it to produce the smoothest result. Concrete is easily stained by adding dye to it while mixing or acid staining it after it has cured. This is especially nice as many people are looking for a unique color to match their existing décor. You can find these products at your local home improvement stores. To begin, you’ll want to make a form like you would for any other concrete project and pour it in. You’ll finish it like you would a garage floor, using a trowel to smooth the top. You’ll want to let the form cure a bit, but not completely before you remove the side forms to finish the edges. If you remove the side forms too early, you may end up with concrete all over your floor!