I haven't heard of kids that age getting cramps (not to say they couldn't though). If it happens a few times maybe its worth taking his to the Dr's? I only get them when I'm pregnant (although this time not as severe) and the Dr had told me it was lack of calcuim as the baby is taking what it needs. I can't see that being the case with Aricyn though, he's still having bottles isn't he? If the massage works then keep it up but I'd look into it further if it continues for too long...maybe even google it??