Video camera surveillance, Biometric data collection (fingerprints), RFID Tags (monitors movement to within centimeters), Galvanic Skin Response Bracelet (monitors a child's physiological responses)
This article, combined with the guide to staying completely anonymous on the internet linked at the end of it, suggest that one of the easiest ways to be anonymous online is to use a private browser like Ghostery, or a private search engine like DuckDuckGo. These services don't track your information the same way that Google does, making your online browsing experience more private and secure.