Our 20 month old also had chickenpox - got it 8 days ago. He has spots all over his face, chest, back, neck and scalp. We have been giving him oat baths twice a day - sock full of oats in the bath and squeezing the juice over his body. Then post bath, we have been covering his body with coconut oil to help the skin to heal and prevent scars. It has worked a treat, although he is over the worst there are plenty of scabbed over spots so we are still continuing the regime and he hasn't had any 'scratching like a dog with fleas' moments!