Ed your right..... the set up on an AT would be kind of intense, didn't think of that one. This will be an important part of deciding on which one. If it's too difficult she could very easily become disappointed and she doesn't deserve anymore of that. Got a feeling when this thread gets rolling you will find some good advice on other detectors. Better yet would be one if our members lived close to you and could offer a test drive. In fact I have a Bounty Hunter 505 sitting idle. New last spring with three coils 4", stock 8", and an 11" DD. It has an on/off and discrimination knob with four digital buttons on the face. All metals, discrimination, notch and auto notch. The all metals button gives you a threshold (hum) The rest when pushed offers the user an audible beep corresponding to the button, second button two beeps, third button three beeps and so on. There are digital screens which give approximate target and depth but obviously that will be of no use. Targets sound off by different tones and that's something she would have to pick up. Test garden in your back yard would be good practice. This may sound crazy and I have no idea where you are but assume its some where near the ocean and in a much warmer climate than I'm in right now. You take a look at the specs and some videos on the BH505. I may very easily be convinced to ship this to you and cover the cost. If it works we can talk about a reasonable price, If it doesn't.... ship in back and move on.