Mine is made at home. I also read a lot of early education materials and asked many people. Now we are using a special training camp for right brain potential experts aged 0-3 years old, which contains many games that can exercise the baby's various abilities, such as splicing shadow spaces and right brain wisdom puzzles. They also sent us alpha brainwave music, which can improve the baby's emotional intelligence. I often play it to my baby now, which is very comfortable for me. Most importantly. . They don't provide offline guidance. If I have any questions in this regard, I will call them and they will teach us how to do it. . . It's much cheaper than going to an early education class.