Why doesn’t a heavy ship sink? Get some clay and we’ll solve this puzzle. If you make a compact ball or sausage shape out of the clay, whether large or small, it sinks to the bottom of the container.

STEP 2 - Compare the football and modelling clay ball in size. The football represents the Sun and the modelling clay ball is the Earth. Because the Earth is always slowly spinning, everywhere on ...

To make the mushroom head, a ball is formed from modelling clay and cut in half. Next is to smmothen the hemisphere out of ...