How many bones do we have when we are newborns?

When a baby is born, it has about 300 bones, because a baby’s skeleton is mostly made up of flexible cartilage (a firm tissue softer than bone) in the body.

But, as the baby grows, some of the cartilage eventually solidifies into the bone, and some bones fuse together to form one bone, in a process called ossification, as a result, finally, adults have 206 bones left in their body.

For Example- Infants are born with the kneecaps, which are mostly made up of cartilage pieces, and become one fully bone at the age of three.