First of all, there is an apple, two bugs come out of it, and three birds want to eat bugs ... This book is called "First of all, there is an apple". The author skillfully integrates boring numbers into vivid stories and expresses the concept of numbers in a fun and interesting way, which is in line with children's visualized thinking mode. But the author's ingenuity is not limited to this: three birds chase two bugs, but one bird can't catch up; Four hunters hit three birds, but one hunter always missed. The concepts of comparison and addition and subtraction are hidden behind the story, and children will definitely get a lot of fun from it.