My son was SO shakey! It worried me a lot. But he grew out of it. All the stuff I read said that babies have an undeveloped nervous system, which is why some kids shake. My daughter had never done this, though, so when my son came along, it freaked me out! He was also shakey long after all the stuff I read said he should have grown out of it. But he finally did stop shaking, maybe by 3 months or so? I can't even remember. Now he is a totally normal, feisty 2 year old. So try not to worry!