The human body absorbs about 30% of the calcium available in milk. The body absorbs about 50% of the calcium available in kale. My kids didn't drink milk (breast or goat) after they were toddlers. They are all water drinkers as adults.
If the child likes her meatballs, hide some kale in them and keep her drinking water. There are also citrus juices fortified with calcium if that is a route you want to take.
