What is the best hidden camera at a reasonable price?

Google "hidden video cameras" and see which one best fits your purpose and price target.

Why is this in the "cheating" category? :|

In today’s society where security is a concern and pranking has become commonplace in many homes, hidden spy CAMERA have grown in popularity.They have become smaller, powerful, and relatively easier to conceal, with everyday accessories such as spectacles, pens, and key chains being some of the most popular designs.

Hidden CAMERAS come in all shapes, sizes, and price ranges. BrickHouse's wide selection of hidden video cameras enables you to monitor your home and office in nearly any situation. Choose from a host of features such as night vision, motion activation, and portability so you can bring your recording device on the road to monitor a hotel room while on a business trip. These covert devices enable you to protect what matters most, giving you the peace of mind to confidently go about your business knowing that your family and property are in good hands.

Some best Hidden Cameras:
Mini USB Disk HD Hidden Spy Camera
GERI Spy Camera for Cars
TRURENDI HD Spy Pen Hidden Camera
Cigarette Lighter Hidden Spy Camera
Toto 808 Car Key Chain Spy Camera Recorder
Risest Secret Spy Camera Mini Clock Radio
Amcrest QCAM QSD-721 Mini Video Hidden Camera
Wiseup 4GB Covert Thermometer Hidden Camera

Source : https://www.zapals.com/

Nowadays there is different self protection equipment available for protection of kids but Nanny Cameras are unique one. There are few parents who can never be completely assured unless they possess a direct view of their kids. In such cases, nanny camera is the perfect answer and is considered as one of the personal protection items. It is known that you can now install a nanny camera at your kid’s room and keep an eye on the activities right from your mobile, laptop or tablet even if you are far. With this equipment, you could catch an unattended child easily and rapidly. Resource http://www.selfdefenseventures.com