It seems like fruit juice and juice drinks would be healthy for your growing toddler, but did you know you can give him too much of a good thing? Fruit juice tastes good and is often packaged so it's easy to carry around, but the American Academy of Pediatrics says excess juice can contribute to dental caries and diarrhea. Toddlers one to six years old should be limited to four to six ounces per day as part of a meal or snack rather than sipping throughout the day.

 

Source:
American Academy of Pediatrics: "The Use and Misuse of Fruit Juice in Pediatrics," http://aappolicy.aappublications.org/cgi/content/full/pediatrics;107/5/1210