I'm sure many great, powerful and rich people think about how they can make a difference world. There are so many big problems, and they require big solutions, right? Actually, sometimes little things can make a really big difference. I learnt this lesson one day nine years ago with my father, when I was just acting like myself-a nine-year-old kid. Papa came home late from work after 9pm. He's a businessman who works long hours, and on this day he looked even more tired and stressed than usual. His eyes were already half-closed from weariness. I, on the other hand, was completely hyper. I followed him to his bedroom, skipping and doing the "Walrus Dance," which I had made up myself. This ridiculous routine involved twisting my arms and legs in opposite directions. Papa trudged up the stairs, slowly lifting his large feet one after the other. He seemed to fall deeper and deeper into exhaustion every step he took. I was afraid that I would have to start pushing him, ...