Abstract: An innovative communication device and learning tool that enables marine mammals, such as dolphins, to communicate with humans and with each other. The communication device includes a keyboard having a plurality of hollow keys. Each key includes a switch which can be activated by the dolphin, and a two- or three-dimensional object which can be distinguished by dolphins from other objects in other keys both visually and through echolocation. A microprocessor based controller can be used to associate audible feedback, such as unique words or phrases, with each key and to generate that word or phrase when the proper key is selected. Thus, a dolphin can select a word or phrase by locating the associated key and by activating the switch for that key to communicate with humans or with another dolphin. Likewise, a human can activate the switch to generate a spoken word or phrase to communicate with a dolphin.