Modular constructional toy kit and instructional story book, for use in forming a customized and personalized privacy guard in the form of a door knocker and learning the importance of protecting and respecting a persons right to privacy. The constructional toy kit allows children to build and decorate their own door knockers. Each door knocker has a base unit and a pivotal member hinged at one end to the base unit allowing the pivotal member to swing in a short arc away from the base unit. When released, the pivotal member swings back to make contact with the base unit emitting a loud sound. The constructional toy kit can also have an integrated holder to store written messages, integrated electronic recording and playback device for personalized audio messages, a smooth flat surface at the lower portion of the base unit suitable for imprinting a child's name, assorted decorations and attachable components to allow for the creation of animals or creatures, paints and commercially available hardware and adhesives.