So that the 3 year old stays healthy and keeps their growing bones strong a 3 year old should drink at least 3 cups of milk per day.
The 3 year old can drink more than 3 cups of milk per day if they want too and you want to serve it to them but they should drink at least 3 cups of milk per day to stay healthy.
Then they can drink other things such as apple juice, pear juice, water and other drinks.
A 3 year old child should have at least 15 to 24 ounces of milk per day to keep their bones and rest of their body healthy.
My son used to drink 5 cups of milk per day along with other drinks and I let him drink as much milk as he wanted because it was both good for him and he loved it.