Description: DIY Assembly Physical Kits: Electric Lie Detector Come with unassembled parts and instruction: assemble the experiment by yourself Working theory: Discover whoandamp; 39;s telling the truth and whoandamp; 39;s lying by measuring a personandamp; 39;s physiological changes, such as blood pressure, pulse, breathing, and skin . An interesting liar detector game. It would be a great warm-up game at a party. Trains childrenandamp; 39;s hands andamp;amp; eyes coordination, fine motor skills, stimulate observation andamp;amp; thinking abilities Great andamp;amp; interesting physical educational toy, also good for parent-child interactive game Material: Plastic Specification: Assembled Size: Approx 15 x 12 x 4 cm / 5.91 x 4.72 x 1.57 inch Package Includes: 1 DIY Electric Lie Detector Kit (Includes Chinese Manual)