I agree with everyone else to let her pick it out. You could make it fun on Christmas, print out your own gift certificate (or "date" card to go to the dealer) and put it, folded up, in the bottom of a box. On top of it put a small sewing machine (a toy or ornament or something similar). I've done something similar and it was fun for them. At first they were obviously confused but when they got the gift certificate (gift card in my case) they lit up!