The very concept of Laughter Yoga is based on cultivating your childlike playfulness. Physical playfulness leads to playful mental attitude and one can laugh much easily while doing laughter exercises.
As grown-ups we do not indulge in childlike play. We stay sober and become more serious. Therefore, initially, you may feel awkward doing these exercises and may find them silly, but as and when you get over your inhibition and shyness you will experience joy and relaxation from within. Laughter Yoga exercises are done in a group with like-minded people who believe in being joyful and playful. With supportive laughter groups you will feel very safe.