in one of my villages i currently have only one child, a pretty little girl. however, whenever i drag her unto one particular collectible (the glassy pebble) she will pick it up and there will be a message saying she is collecting a new item. instead of taking it to the research hut, though, she apparently keeps it to herself: the pebble will simply disappear and she will go about her usual business again. This has happened three times already now but only in this one game with this one child. Has this happened to anyone else before?

EDIT:
right after i posted this she did it with a black pebble too. she must love these things, i'll make her a breeder at least there will be something to inherit from her!