Complete the circuit of this amazing Sensor Stick by touching both ends at the same time and be rewarded with super light and sound effects which will amaze children and adults alike This Light up Sensor Stick can be used by one person or as a great novel introduction to cause and effect, or the science of circuits. An excellent engaging way to encourage group participation and encourage your group to form a circle and all hold hands to complete the circuit and make the light and sounds come to life Take turns letting go and break the circuit again. Activate this tube's sound and light effects using only touch with this human-powered tube. Touch both silver contacts at the same time to complete the circuit of the Sci-Fi Tube.Join with friends and family to create an even bigger circuit.