Turtle and Miaomiao Rabbit, there must be some kind of magical dimensional gate hidden in their tree house paradise, otherwise, why would they come to Pig Town again? This time, the three little pigs were worried again, because their balls fell under the "dinosaur valley". Miaomiao Rabbit took the tortoise to the bottom of the valley to find the ball by using the infinite stretching ability of his arm. Unexpectedly, they happened to meet the dinosaur childe in the dinosaur valley here and became good friends with him! When reading this adventure story, children will be able to learn how to know the direction.

This book is a wonderful set of stories! A set of fun math! The author perfectly integrates picture book stories with basic mathematical concepts!

Father has a math story, mother has a math story, and children also have math stories. Whenever and wherever there are mathematical stories, let children study happily, give them a pair of mathematicians' eyes, and let them know the mysteries of the mathematical world from an early age.