Spy Labs: Listening Device from Thames & Kosmos As a detective, you always need the right tools when you are on the hunt for evidence. Reach for this Listening Device when you need to supercharge your hearing abilities. Listening device for pretend spy and detective play Direction microphone amplifies sound, allowing you to listen in from a distance without being detected Sound plays in earpiece Recommended for ages 8 years and older. Includes: Experiments: 2, Piece Count: 1, Manual Pages: 8 pages.