A toy doll is described having a first member and a second member coupled to said first member. When an electrical characteristic of a flame detector fails to cross a threshold level during an ignition attempt and when the electrical characteristic of the flame detector changes by a predetermined amount, the control system may activate an indicator indicating a problem with the flame detector. A BSC communicates with a plurality of CPE, including dynamically varying communication parameters for each CPE and substantially simultaneously scheduling traffic for each such CPE in response to those varying communication parameters. An opening portion surrounded by the fixing portion, the radial sub-fin and others forms an axial air flow passage.