OP here:
Thanks for all the replies everyone! I'm still browsing and researching.. just trying to find the cheapest route possible that will actually give a decent amount of minutes.
Kajeet seems to be fairly expensive for what you get. The phone prices aren't too bad as long as you buy the cheapest one.. but then to have to pay $14.99 per month for 60 minutes seems a bit more than I wanted to do.
I'm looking into the AT&T, but it's very confusing to me what I'd have to do.. very naive on SIM cards, etc..
At this point, still leaning toward PlatinumTel, although Tracfone seems similarly priced too.
Crikett at $35/month is way more than what I wanted to spend, although it does offer unlimited calls/texts.
I can't add her to our plan, because we're combined with my parents and already maxed out on phones we can have.. so will have to choose a separate plan for her if I do decide to get her a phone.
Thanks again for all the help!