A good day to start your day is by laughing. It doesn't only cheer you up, but laughter also stimulates your immune system. I bet this adorable baby is as healthy as much as it is happy :)
Why do babies cheer you up? Probably because you remember your baby movies and/or photographs. Memories can play a very important role in the brain, especially if they are thoughts of joy. See how much of this can be connected to a single video or photo?
Most feelings are expressed in a special part of the brain, called the limbic system. But anyway, let me not ruin your day with medical facts! I'll bore in some later posts. For now, enjoy your day! :)