This paper describes the use of LOGOWriter with fifth grade boys as a means of developing programming procedures for computer games that they could use to simulate motion with acceleration, as well as techniques for controlling the direction of motion. The kinds of programs developed, student responses to this work, observations about teaching issues which arose, and details about several different ways to approach the topic with a group of students are all considered. It was found that the agenda of developing reasonably accurate simulation of motion fitted neatly into projects that the students--who had several years of previous Logo experience--were already highly motivated to develop, and new ideas generated by the students permitted opportunities for student-teacher interaction. The extent to which students were, and could be, permitted to discover on their own and the extent to which teacher intervention was required is also discussed, and it is noted that two different approaches were used with different groups of students: a discovery method with students working from a target game, and the development of an individual game project by each student. The particular experiences of several individual students are also described. (EW)