The DAS allows you to wait in an "alternate" location. After visiting Guest Services, they will activate the DAS for your DD, and link your family to her, so you can all ride together. You will then go to the attraction that she wishes to ride, and the CM will give you a return time. This is usually the standby wait, minus 10 minutes. When that time arrives, your DD, and who is riding with her returns to the attraction and enter the FP line.

However, please note that oftentimes instead of a DAS, Guest Services will recommend a wheelchair for a situation where it may help, such as a bad knee, or other mobility-related challenge. Not saying that will happen, but want you to be prepared that it may be what they suggest, instead of the DAS.

Since you can only have one DAS "wait" active at a time, using your FP's is still important to keeping your overall wait time down.

Enjoy your trip!