[1] It appears to work utilizing the two sets of right/left tracks to have the "interactive" mono audio segments.
[citation needed] It also provided a record capability so as a child could add in their own voice and create interactions with characters on the program.
It was invented and Patented by Michael J. Freeman Ph.D. and licensed for use by the Children's Television Workshop (owners of Sesame Street) and the Walt Disney Company, among others (see list below).
[4] Talk 'n Play was considered 'way ahead of its time' because it was the first of this genre of educational toys that allowed children to directly interact with famous characters, via Freeman's system.
Other non related items have been released from Hasbro bearing the mark Talk 'n Play.