I remember seeing years ago a robot-like caricature of a man, son, and dog in an advertisement. I wish I could give more details, but I can't. It may have been Lego. Infringement is always an issue, and I certainly can't give advice on that. Since you want to promote electronic kits, I would try to work something specifically related to those kits, such as an RC controlled dog with antenna, a soccer ball made with PC boards, a 'hello world' LED display, whatever. Although, the robot connection to electronics is pretty strong, it is very widely used in electronics and other ads, including cars, as well. Thus, I would try to incorpoate something more directly related to your kits. Just an opinion. John