Goethe,/kloc-a great German poet and playwright in the 0/9th century. When he was a child, he and his father traveled everywhere. Wherever he goes, his father tells him about the local customs and historical geography. When I came back for the second time, my father asked him to speak and trained his memory and eloquence. These have played a great role in his later creation. Qian Xuesen is an outstanding scientist in China and has made outstanding contributions to China's space industry. When Qian Xuesen was a child, he liked to play the game of throwing paper darts. Folding paper darts are first folded diagonally with a square piece of paper to grow into darts with sharp points like arrows. Then, throw it hard to see whose darts fly high and far. As a result, the students are not as good as Qian Xuesen, because the paper darts he folded are symmetrical and flat, and the gap is very small. Play made Qian Xuesen develop the habit of thinking with heart since childhood, and he should try to find scientific methods that conform to the law in everything. This is of great help to his future achievements in science.