Hah, yea sorry about that if I sounded all high and mighty. I just like providing thorough information when possible.
Anyway, you don't have to wait until they are weaned to start introducing new foods to the kids. At this age, they're still a bit young. But around two weeks, you can start offering a handful of hay and grain (use a goat based feed, not one for sheep. If the label says it is for sheep and goats, it won't have enough copper for the goats). Start with tiny amounts, because they likely will waste it all. Bottle kids can be a little hard to introduce 'real' food to, since they don't have another goat to learn from. But the plus side is, goats explore with their mouths. So if they mouth the hay and pellets, they will eventually decide it is tasty! Sometimes if they just aren't understand, popping a few pellets in their mouths a few times will teach them it actually is yummy. Once they start eating the solid, gradually increase the amounts, while decreasing the milk. Weaning is often done between eight to twelve weeks.
I give mine non alfalfa hay too. But alfalfa is good if you can get it. When a goat isn't growing (less than a year), pregnant, or lactating, some people feed them just the hay and no grain.
An important part of their diet you will need to introduce them too is also a mineral. A loose mineral is actually better than a mineral block. The blocks are composed of mostly table salt, NaCl, and not much in the way of important minerals like selenium, zinc, copper, etc. The table salt is what holds the block together. So the goats fill up on table salt, and don't get enough of what they actually need. Most loose mineral mixes have only a little table salt to make it more palatable, but have higher amounts of the other minerals. To feed a loose mineral, you offer if to them in a clean, dry, draft free area. I have a little pan attached to the inside wall of the barn that they can go to as they need it.