She loves the fitness part of it. Hurdles, jumps, bongo board, bozu, agility ladder, resistance runs, core work, etc. I owned a fitness center for 15 years, so am able to coordinate that aspect of her training.
TCF, have you structured such activities (i.e., followed a specific plan), or have you integrated these plyo/agility/balance drills into day to day fun and play? I've started working with my son to develop a better athletic base (fast twitch exercises, SQA type stuff), but it's sometimes hard to know when to do it (on off days or before hitting balls?) and how often (I don't want him to overtrain at his young age).
FYI, Donald Chu, who co-authored Progressive Plyometrics For Kids, recommended starting his program at age 8-10.