Generally, those who want to bring home a kitten wait for the weaning age (therefore 35-40 days), The selfish desire to have a puppet that eats alone can create both physical and psychological problems for the puppy. It is very important to remember that:
Mother's milk contains many antibodies, so the longer breastfeeding is, the healthier and stronger the puppy will grow.
Only after thirty days of life does a cat begin to learn the sociability and behaviors typical of a feline through playing with its mother, so it is good to be patient for a while to have a more balanced cat.
It would be better to wait until your baby is 50 days old (preferably two months, two and a half months). In fact, we must remember that a cat, even if it is 5 months old, is always a puppy and able to become attached to its owner like a younger one, even more in many cases.