Service Learning (SL) is a teaching and learning strategy that integrates meaningful community service with instruction and reflection to enrich the learning experience, teach civic responsibility, and strengthen communities. Students in a technical elective robotics class in the Mechanical Engineering Department at the University of Texas at San Antonio (UTSA) opted for either a final project or service learning for 25% of their grade. For SL, the students had to work with elementary and middle-school children in San Antonio over a period of 10 weeks to mentor them on building and programming robots with LEGO ® Mindstorms ® for the FIRST ® LEGO ® League tournament. In parallel, the undergraduates also learnt LEGO ® Mindstorms in the class by creating robots for assigned labs. This way they were able to apply concepts taught in the class towards community service. As part of the service learning option, the students completed self-reflection journal entries before-, middle-, and end-of the program. For assessing the SL, the undergraduate students were administered a survey at the end of the program. The self-reflection journal entries indicated that the main challenge faced by the students was their self-doubt about their ability to teach robotic and engineering concepts and to sustain the attention of the children. The surveys indicated that the students felt SL motivated them to learn and improve understanding of the course material. Students also felt that there should be more SL options in the Engineering curriculum. Finally, an analysis of students' grades in the course indicated that those who selected the SL option scored one grade higher than students who did the final project option. Our conclusion is that SL is a promising approach to improve students learning outcomes while benefitting the community.