Director, Robert Humble ; photography, Robert Humble ; producer, Tom Daly ; executive producer, Colin Low ; commentary, Stanley Jackson ; sound, Bill Fowler, Bev Davidson, Michel Hazel, Richard Besse ; editing, Margaret Wescott ; sound editing, Donald Douglas ; consultant, M. Sam Rabinovitch, Jerome Kagan.

Narrator, Stanley Jackson.

Recorded 1974.

Trial and error and challenge, and the beginnings of communication. Robert is a little older than Debbie; both are of the same family. Both like to experiment, to copy and explore, but sometimes their aims run counter to one another. Their behaviour in this film is typical of the second year of life and illustrates the process of learning that goes on through every waking hour, and the kind of guidance a parent can give.

Mode of access: World Wide Web.

Description based on online resource; title from title screen (National Film Board of Canada, viewed 2023-08-10).