Eureka! was the name of a series of cartoons aired on PBS during the 80's. Each episode was 15 minutes long, and discussed various topics. The characters were these funny looking skinny people who talked in a sort of nasally voice(reminiscent of the teacher from The Peanuts television shows). Their appearance was similar to Hagar's sidekick from the Hagar the Horrible comic strip. Not only did they have lanky bodies, but they also had long noses. One topic that I recall was basic machines. They discussed levers, pulleys, screws and such. I wish this show was still on the air, because it was high-quality merchandise.