What are the steps to removing old handle wrap and putting on new? Any suggestions on what wrap to buy? This is for a 13 year old girl. :D

Here's a good article about it (and Google for more) --

How To Tape A Bat Handle | LIVESTRONG.COM

As you wrap and layer the tape, let the child grip now and then to find out what is most comfortable. Cushioning will be needed, but if the layers are too many, the grip will not be good, and the handle will be too thick for good batting.