Or we could call these "drinkable yogurt."
The recipe is super simple. Add milk by the tablespoon to a small amount of yogurt, any kind, until it can go through a straw pretty easily. It cuts some of the sugar of flavored yogurts, it's less messy than feeding a cup of yogurt to a toddler, and it's a change of pace from normal. And you don't have to get the blender or anything else, besides a spoon, messy.