This is Teresa's, she used salt dough on top of a shoe box covered in some fabric we had that looked like stone. Then she painted it. They had to put things in the sarcophagus, so she made a few things and went through her "collection" to add lucky charms.
(Her "collection" is stuff she finds, ever since she was very small she has collected - well, anything. It was mostly full of sticks and rocks in the beginning, but now she has charms and stones and beads and buttons, string, anything she finds, it goes in her collection)