For the past 3 years LEGOs have been used to teach design, creativity, and structured programming to freshmen mechanical engineering students at the University of Nevada, Reno. MECH 151 is a 3-credit hour course offered as the second semester of a first year mechanical engineering design sequence. The class utilizes a projectbased learning environment, which consists of approximately I O design projects of increasing dflculty and scope. The course culminates with a robot battle and a presentation to local K-12 schools. Assessment methods include student surveys, external evaluators, evaluation of projects, and enrollment data. The use of LEGOs was found appealing to the students while providing an excellent medium for teaching design, programming, and creativity. Student enrollment has grown over 2 fold since the introduction of LEGOs.the LEGO RCX (e. g. [2]) and the MIT Handy Board (e.g.[3]). Deemed more appropriate for freshmen mechanical engineering students, the RCX (Figure l), in combination with ROBOLAB, was selected for use in MECH 15 1.