The Gimmiz make your own lie detector test will provide no end of fun when it comes to building and using it. Simply construct the card pieces, add the electronic parts and connect a battery (not included). Will you discover the truth? Put your friends and family to the test. Includes: card outer body (4 pieces), electronic components and instructions. Requires: 1x 9V battery. Warning: Not suitable for children under 8 years. Small parts. Choking hazard.