Fireflies communicate with each other using special light patterns, or "firefly codes." Can you speak firefly? With this simple device, you can. Press the button, it blinks, and they come to you. Program your communicator to display known firefly patterns and new ones. Comes with a lanyard, a 20-page comic book and instruction manual, and access to the free Speakfirefly smartphone app. About 3" long; 35" lanyard. Ages 8 and up. Not a scientific instrument, but a cool science toy.