Dr Madan Kataria, the founder of laughter yoga, developed laughter therapy which is used to improve emotional wellness. A bout of hearty laughter releases endorphins resulting in the ‘feel good’ effect that lowers stress and boosts the body’s immune system. But laughter therapy is more than just indulging in a fit of laughter. According to this post,  a laughter therapy session has 4 basic steps: - Clapping and warm-up exercises that help build positive energy in the group. - Deep breathing exercises that result in mental and physical relaxation. - Childlike playfulness that helps bring a happy mood and laughter. - Laughter exercises that may involve playful games and narrating funny experiences. (Source)