Ringe teaches you how to improve your child’s memory and imagination in 21 days

Actually, to be honest, everything in the book is correct in the opinion of the author, but everyone is different, just like that flash card, not every child is useful, because every child Children have different natures, just like the saying in the Three Character Classic: "Sex is similar, habits are far apart". So I can't give you a conclusion in this book whether he is good or not, because the same method will always work on different children. There will be different methods, but there are definitely uses, because many of the above things have indeed been practiced. According to the results of most people, I personally recommend that you buy them, because for children, a little bit of insignificant education in childhood may be enough. It may affect his future life, and compared with the money a child spends in his lifetime, the money spent on books is just a drop in the bucket