Generally, when the baby's multilingual ability begins to develop at the age of one, the mother can teach the baby to count. You can simply teach your baby to count from one to three. For example, when playing or climbing stairs, mothers can teach their babies not to dislike their stupidity. Learning is a process, and you will find that your baby will count unconsciously.
If you want to make your baby's intelligence develop better, you can take your baby to some early education courses. Early education teachers will guide mothers and children to learn through play. When the baby is older, you can go to kindergarten or nursery school. With teachers teaching children, the baby will learn a lot soon.
When the baby learns to speak, don't laugh at the baby because the pronunciation is not accurate. We should encourage the baby to speak and play more, encourage the baby to speak incorrectly, and then continue to teach the baby correct pronunciation, so that the baby will become smarter and smarter before you know it, and learn more and more words.