Eva

It was always just me, my parents, and my younger sister Eva. Just us in a small community.
On Eva's sixth birthday an enormous parcel was sent to her reading "DO NOT OPEN UNTIL 12TH BIRTHDAY". The parcel was huge, it was about the size of boxes used to store fridge freezers, and was covered in stamps. The parcel was clearly addressed to Eva, but there was no return address and the only information read from "a relative"...