Many students hold incorrect views of what computer science (CS) is, and they have negative attitudes towards the field. In order to address these difficulties, a series of learning activities called Computer Science Unplugged was developed by Bell et al.[3]. These activities expose young people to central concepts in CS in an entertaining way, without requiring a computer. Using questionnaires and interviews, we examined the effect of the activities on middle-school students' views of CS, specifically, on their views of: (a) the nature of CS; (b) the characteristics of computer scientists and work in CS; (c) the variety of employment in CS. The results indicate that-although the students generally understood what CS is-they perceived the computer as the essence of CS and not primarily as a tool, contrary to the intention of the CS Unplugged activities. We suggest additions to the activities intended to increase the change in the views of CS that students have.