All the circuits here can be constructed using items common in the home or easily purchased--aluminum foil (for wires), flashlight batteries, a flashlight bulb, rubber bands, etc. These items are arranged--and rearranged--to illustrate what is required to make a complete circuit, the meaning of terms such as ""series"" and ""parallel,"" how a fuse works, etc. Markle's use of common materials is ingenious (although working with strips of aluminum foil instead of readily obtainable wire seems an odd make-shift). She carefully limits herself to the simple idea that electrons can flow from a battery to a bulb only through a complete circuit made up of conductors. This suits the book to young children, or to those without much interest in science. Budding Faradays will not feel challenged. Clear drawings; murky photos; index.