2. Shape Transformation
Adult: "But wait! Look what happens when I push one corner of the coin towards the center! Yes, it lands on a green square! Let's do it with the remaining corners and see what we get. Oh, wonderful. A rhombus."

"I wonder what will happen if we push them one square towards the center? Ooooh, look! We have another square. Is it bigger or smaller than our first square?"
