By the time your baby reaches the age of 3 months, he is going to display signs of laughter, when his bones are tickled. His smiles will turn into guffaws at sensory movements shown by you. The triggers and the reactions might be different but inevitably, your baby is going to show you plenty of laughs.
What you need to know Laughter is certainly healthy for all humans. Your baby should definitely get a healthy dose of that laugh as often as possible. Not only will it make him grow, it will also improve bone and muscle movement in your little baby.