The best drinks for children over one year old are plain still water or plain milk. Cow's milk is not suitable as a drink for babies under 12 months of age. Your child should have full-fat milk (whole milk) from the age of 12 months to two years. Semi-skimmed milk can be introduced from the age of two, as long as your child is a good eater and growing well for their age. Skimmed milk can be given to children aged five and over.