To investigate sex-stereotyping associated with computer use, a study was made of effects of gender and age on preschool children's involvement with computers during a school period allowing children to choose from among five alternative activities. A group of 16 boys and 16 girls was divided by age, with the resulting categories consisting of 17 children under and 15 children over 5 years of age. Data were collected by observing classroom activities in 30-minute periods, 3 days per week, for 5 consecutive weeks. Observers recorded each instance that a subject chose the computer activity. Results of a univariate analysis of variance for gender, age, and the interaction between these two factors revealed a statistically significant difference between males and females in the choice of the computer activity only for children under 5 years of age. It was concluded that the findings lend support for the practice of providing experiences with computers for preschool children. Implications of the findings for sex-stereotyping were briefly noted. (RH)