Many parents have concerns about the nutritional value of plant-based milks, such as soy milk, soy yogurt, and low-fat milk. However, research has shown that these drinks are not as beneficial for toddlers as cow's milk. Among the recommended milk beverages, whole milk is best. However, if your toddler is overweight, you may want to consider using reduced-fat or low-calorie milk. Some children have a family history of heart disease, obesity, or high cholesterol, so choosing plant-based milk can be tricky.