Show and Tell by LeNing Education is a textbook for school-age children published by Oxford Press. Generally speaking, it is suitable for children aged 4-5. Textbooks still have basic requirements for children's English, but they are not suitable for children with zero foundation in English. I am a course consultant of LeNing Education, so I know this better. My suggestion is that if you want to learn English, you should start learning it at the age of 3. After all, 3 years old is the golden age of learning a language. Of course, it is no problem to study in Lening at this age.