Instructables Design Studio founder Randy Sarafan had a few projects on display at the recent World Maker Faire. He was showing some of his well-known robotics projects but the one that really caught my eye was his homemade kaleidoscope with a clamping mechanism for holding your cameraphone steady after you position the camera’s lens against the viewing receptacle (shown below) of the kaleidoscope:
A small motor could turn the kaleidoscope, or alternatively you could point it at something which itself is moving (such as images on a screen). The clamping mechanism allows you to record video or take stills of kaleidoscopic images like so:
See more of Randy’s projects here on his website.