When the little black ball, which had just started to forage independently, encountered a walnut, his little head was filled with a longing for delicious food. But how to open the hard shell of walnuts has become the most difficult problem at the moment. So he tried to recall the skills his mother had taught him and took action immediately. The first way is to throw it down from a high place. The little black ball was thrown and failed. Throw it again and it fails again. Throw it again, still the same result. He did not give up and tried the second method - hitting the shell with pebbles. He knocked, he knocked hard, and he kept knocking. After knocking without strength, the little black ball took a closer look and found that only a layer of skin on the surface of the walnut had been knocked off...
Intention: explore and try.