joeO is partially right. water is the best but poweraid, gaterade( a little better than PA) are good for any one. just get the basic without all the 'tuarine' & energy boosters. basic is just electrolytes, not for the mentioned getting strength back (that's just do to the rehydration)& less sugar than pop
I do not think its wrong for her to have taste but she should take it only if she's into sports or an activity that is very active. PowerAde is a sport drinks that helps athletes and active people rehydrate and get their strength back.
Also good for people, including children, who are not holding solid food down. Both gaterade and poweraid have plenty of electrolytes to keep hydrated and energy when a proper diet may not be in the cards for a day or 2. Not a replacement by any means, just helps to balance is all.