1, please help him learn to draw a clear conclusion about "problems" or things every day. This conclusion has a subject and a predicate, preferably an object, which can be called a simple and complete sentence. For example, I want an ice cream today to avoid confusion. Then ask him why, give reasons, and the best reasons are three. This is the starting point of logic.
2. Learn to classify things. For example, put today's things under today and tomorrow's things under tomorrow; Fruits, vegetables and milk; He is further required to further classify Chinese learning on the basis of mathematics, Chinese and English, including word learning, article reading and composition writing. Don't underestimate this. The so-called science begins with classification, such as separating physics from philosophy and separating medicine from witchcraft. The simple logic of human beings is to classify first.
3, from the Internet to find logical games to play, a lot, in fact, chess and cards have logical judgments, under the guidance.
It's up to you to look deeper, such as many examples of induction and deduction. Conclusion: Are all mushrooms delicious? There is an example where the exception does not hold. Deduction: people will die, you are human, so you will die. Wait, but you have to make it interesting. Mathematics is the application of logic. Let's talk about this first.