This material describes two games, Minicomputer Tug-of-War and Minicomputer Golf. The Papy Minicomputer derives its name from George Papy, who invented and introduced it in the 1950's. The Minicomputer is seen as an abacus with the flavor of a computer in its schematic representation of numbers. Its manner of representation combines decimal notation with binary positional rules, and takes advantage of a well-established system seen as technologically desirable. The Minicomputer plays an integral part in the Comprehensive School Mathematics Program (CSMP) curriculum. The two games detailed were developed by Frederique Papy in 1976. The rules are few, but the games are thought to give rise to intriguing mathematical considerations that help pupils develop strategic thinking, sharpen mental arithmetic skills, and provide opportunities to employ estimation techniques. Four lessons are presented, each designed to take 30 to 60 minutes to complete. The material is written in a standard CSMP format of a dialogue between teacher and students. (MP)