We didn't realize that the glowing part was inside the locket itself. We thought it was a layer that was part of the opening/top outer face. But it is inside where a picture would go. We wanted to put a picture inside like a traditional locket, but that would cover the glow stuff and could be seen through the cover when closed.
Weird design.
Not returning, because my kids still likes the novelty. The glow stuff has a soft, almost gooey texture, so she likes to poke at it.