One 2.5 inch Growing Poo Gag Gift. Play a hysterical joke with this gag gift! Set it out and watch everybody squirm. Soak it in water for 48 hours to lighten the color and increase the size. After 8 days, it will reach its maximum size, 600% of the original! As it dries out, it will slowly return back to its original size, so you can use it over and over.