Babies eyes change color around the ages of 3 months and 6 months of age which is when the most dramatic eye color changes will occur.
By 3 to 6 months of age the iris has enough pigment so that you can be able to predict what the final color of the eyes will be.
Some babies also experience changes in eye colors up to 1 year of age and some babies eyes may even continue to change in hues of colors until 3 years old.
Babies start smiling around 6 to 12 months of age.
Even shortly after the baby is born they may seem to smile some but it's usually not a real smile or meaning of a smile.
Eventually the baby will begin to smile when they see something they like or when they see their mother or father or someone else they love.
Even toys can make a baby smile.
A baby's first laugh will usually begin around one month after their first smile.
Though 4 months of age is a common time for a baby's laughter to emerge, it could happen at 5, 6 or even 7 months old.
Babies also love to imitate facial expressions, so the more you smile at your baby, the more he or she is likely to smile back at you.
By responding to your baby's smiles and engaging with your baby in this way, you'll be encouraging his or her development.