Help Dad Get Daughter Started!, A complicated (for me) Christmas gift Options

[chanzilla]

For Christmas, I want to give my teen daughter a "portable music studio." I'm not rich, but she has shown great promise in the studio, so I want to encourage her even more with the perfect gift.

Here is where I am. I am donating my Pismo 500 with Jaguar. I will upgrade to Panther if highly recommended. Um, that's as far as I got so far .

Here's what I'm aiming for. If she gets a tune forming in her head, I'd like for her to open up the Pismo, launch an app, and start fingering the notes together with an instrument of her choice. She can record the simple tune, and play it back for review, change the instrument on the melody if she wants to. She can create another track for drums, etc. Once she has her draft version, she can save the file or burn it to CD (there's a modular burner I picked up on eBay) to share. Is this possible? Can it be that simple, or is there a learning curve?

She does have a nice Yamaha keyboard I gave her last Christmas, which she enjoys and has shown enthusiastic talent for. It has a MIDI port, and I know I'm going to have to dish out for a USB-MIDI interface -- any recommendations? While she already has a music keyboard, I want her to be able to create on the road with just the laptop, if possible.

Also, if she wants to add vocals or a non-digital instrument (my acoustic guitar, for example), is it hard to do? Can she just plug into the mic jack?

What is a good program for recording music tracks? For a beginner with room to grow? Does it take more than one program to do what I described above? Where can I go to learn more about how all this stuff works?

By the way, if you haven't figured it out, I know NOTHING about music production. I am a mac addict, but that's about it. I need to learn just enough to help her get started. I appreciate any help, advice, suggestions, links, references, whatever you can provide to a fish out of water.