Bass Amp Purchased Thank all you bunnies for your advice and encouragement. It was hard to actually select, but this was the closest that fit her needs. She is the kind of kid that would have said 'no don't buy anything for me' but then appreciate that we did. So I did this on my own and did not take her shopping for one.
I decided to go smaller (70W) but go with Gallien-Krueger quality. She is quite thrilled, and it is portable enough for her to shlep up to her room and down again.