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