So you are looking for a tiny spy camera to capture all the action without raising any suspicion? This super tiny RETTRU camera is worth a look. It has 1080p resolution and measures 0.4 inch tall, 1.14″ long, and 1.14″ deep. It has night vision up to 5 meters.
This tiny camera has motion detection and loop recording. It supports SD cards up to 32GB.
[where to get it]