She should definitely use their bike... they will have one that fits her. I don't know how much experience she has riding at reeeeeally slow speeds - can be a bit tricky at first (as you know) so by using their bike, she can drop it and see what its like to drop it and not feel bad. AND she will have the opportunity to ride a POS bike which will REALLY make her appreciate that badass 2fiddy. (I LOVED mine.. kinda sad that I sold it...but i love my new bike too)