Sponge Pyramid

I scrambled up a kitchen stool right after dinner and spotted four clean, dry dish sponges by the sink. Two bright yellow, two ocean blue! I grabbed the first yellow one and gave it a big squeeze. It squished and puffed right back up! I dragged two side by side to make a firm base, balanced another on top, and patted the last blue one right at the peak. A soft pyramid! When I poked the center, the whole thing wobbled like jelly without falling over.