Zunk writes “While traditional approaches essentially start with a “brain,” and attempt to build robots “downward” from that, BEAM robotics starts from simple reflexes, in a “bottoms-up” approach. The majority of BEAM robots are non-computerized (although simple CPUs can be used to drive them, in a “horse and rider” sort of way). Unlike many traditional processor-based robots, BEAM robots are cheap, simple, and can be built by a hobbyist with basic skills in a matter of hours. Because of this, BEAM is an excellent way of getting started in robotics, and of learning about electronics”. Link.