Problem Based Learning (PBL) that is important for engineering education and has been a tool for creative engineering design can enhance creativity and has been used to successfully carry out many experiments in the real world. Researchers in the US and Japan (the authors) are pursuing studies about its use in a virtual environment, one with cutting-edge technology and opportunities for complementary activities between face to face learning and electronic learning. Here students can work from anywhere in the world, at any time, and with their own pace. Student teams from the US and Japan have already carried out several problem-based learning projects in Second Life (SL). The US teams’ successful projects are presented and compared.