Cute and no rolling diapers! - I love the square cake idea, it's much easier and smarter! I'd use different colors and more decorations but I've never seen the diaper cake in square form before, and I absolutely love it!
Baby Sprinkle Centerpiece - Blue or white poms - add paper or crystal rain drops, and use black/white or gold ribbons to tie diapers together. Also can be used for ANY party centerpiece just not w/ diapers.