The MAME-CAM, created by Japanese company Thanko, weighs only 11 g and shoots video and photos. The mini camera cost around $100. It shoots video in 640×480 resolution, pictures in 1,600×1,200 and records audio in mono quality. It has a battery life of about 36 minutes (when shooting video).
But know that the video and photos will come out looking terrible, just take a look at the following samples. Tiny camera not up to task.