Manufactured by Manning Manufacturing Company in 1961, this is a simply galvanometer that was made into a toy. It has three possible results: (1) “Are you Kidding;” (2)“Little Whopper;” and (3) "Big Whopper.” It has two adjustment knobs, one for sensitivity and one for “adjustment.” Although just a toy, it is probably as accurate at the two voice stress machines shown above.

Using some of the same circuitry as the two voice stress machines shown above, this miniature “lie detector" is marketed by Sharper Image. It has a series of colored light on the left side starting with green, progressing to yellow, and ending in red. This device is left on a desk in front of the person being questioned and depending on the number of the colored lights a subject’s response elicits, it is supposed to determine trughfullness or deception. It simply doesn’t work.

This portable lie detector is about as big as an inverted soup bowl. It is manufactutrer by Paladone in China. A test subject puts his hand into the harness on the top of the device. Once turned on, a series of lights revolve around the device for several seconds after the subject answers a question. A series of colored lights progressing from green to read light up on the front of the device to tell the “examiner” if the subject is lying. One interesting thing about this device, if it detects what it believes to be a “lie,” it sends a rather uncomfortable shock through the hand. There are two levels of pain selectable, “Low” and “High.”