A cool scientific set where you build your own spy voice recorder and disguiser.
Build a cool voice disguiser machine that plays back up to 6 seconds of recorded message in a freaky voice with this brilliant DIY spy gadget set! Simply connect the circuits by plugging each electric block into the base and connecting the wires. Then hold down the button to record your message and turn the disguise knob to change the speed of your voice. Learn the science behind the gadgets!