How do I make soup using rib bones?

NOTE- I don't have a crock-pot. I cooked baby back ribs tonight and got the idea to make soup with the bones and leftover meat and some vegetables. We have frozen veggies so I can figure that one out, but what do I do to make the liquid? Just boil the bones? For how long? How much water? I have a good size baggie of them in the refrigerator (the uncooked slab was like 3 pounds) Lol sorry I've never made soup before but it seemed like a good way to get my mom to eat veggies.