Hi Musiclover,
Glad you found Kyle's response helpful.
Our Blood Flow Stimulation Therapy wrap is totally safe for children (but not infants) to use, although we'd probably recommend adult supervision until you see she is using it correctly. Assuming you purchased a Wrist Wrap, it's a Neoprene wrap with Velcro straps, so one size fits all and it can be wrapped around her hand, wrist or lower arm, wherever she needs improved blood flow.
You don't mention that your daughter has any other health concerns, but there are some contra-indications for circulatory diseases, cancer and haemophilia. Please feel free to contact us in person (toll free: 1-877-661-5239) if you'd like to discuss this in more detail, in a less public forum.
Adrienne