Can second-grade students construct an understanding of sophisticated science processes and explore physics concepts while creating their own inventions? Yes! Students accomplished this and much more through a month-long project in which they used Legos and Robolab, the Lego computer programing software, to create their own inventions. One independent school has two classes at each grade level, preschool through eighth grade. The heart of the curriculum is the daily "Project Workshop" in which students conduct in-depth investigations of realworld topics. So, two years ago, when the second-third-, and fourth-grade teachers received a grant from Tufts University's Center for Engineering Educational Outreach to use Lego Mindstorms (Lego materials designed for use in classrooms) in the curriculum, faculty naturally wanted to incorporate the materials into project workshop time. Teachers from both second-grade classrooms developed this engaging, integrated inventions project that used the Lego robotics kit and addressed science and technology curriculum standards, while also helping students develop scientific inquiry skills, persistence in the face of challenges, and the ability to work collaboratively with others.