Have to agree w/the above poster. Also, I remember getting my ears pierced. Since I sleep on my side and my ears were tender, I didn't get a good night sleep until the holes healed b/c it hurt to lay my ear (w/my head putting pressure on the new piercing) on the pillow. Would hate to see a child lose sleep at WDW! And, do you really want to take care of her ears (washing, turning earrings) every day and night while on vacation? What if they should get infected?
Instead, I would buy her some pretty earrings w/the promise of getting her ears pierced when she gets home!