For me the pinhole camera evokes a sense of wonder, that such a simple device can lead to a reproduction of the world seemingly captured in a box. It is a reminder that despite the wonder that accompanied the announcement of the daguerreotype, photography has at its heart some basic natural processes.
These images were made by placing things inside a large pinhole camera. Where the object blocked the light a shadow or photogram was left on the photograph. So these images are a combination of photogram and pinhole photograph.