My son had a kind of meltdown on Sunday - combination of lack of sleep (travelling and changed routine), too much excitement and the usual "trigger" of not getting something he wanted. We were staying with a friend who is a yoga teacher and has practised massage. She suggested to him that she give him a massage with a kind of roller thing... several small wheels set on a handle. He eagerly agreed and lay still while she rubbed him all over, head to foot. Afterwards he was noticeably calmer, in a sweeter and more amenable mood. I am thinking that a regular massage session, maybe morning and evening, might be helpful.