In the preschool education machine, readers are more professional and experienced because they set foot in earlier. Anyone who knows BBK knows that BBK's products are very good, at least in quality. BBK's habit is to look at the market. The learning machine market was first made by Wen Quxing, and BBK didn't get involved until a few years later, but the products quickly adapted to the market demand. Therefore, BBK is not bad at learning machine, and it is not as good as the digital learning machine series suitable for middle school students and high school students. In early childhood education, it is best to read a book.