  The field of quantum information is becoming more known to the general
public. However, effectively demonstrating the concepts underneath quantum
science and technology to the general public can be a challenging job. We
investigate, extend, and much expand here "quantum candies" (invented by
Jacobs), a pedagogical model for intuitively describing some basic concepts in
quantum information, including quantum bits, complementarity, the no-cloning
principle, and entanglement. Following Jacob's quantum candies description of
the well known quantum key distribution protocol BB84, we explicitly
demonstrate various additional quantum cryptography protocols using quantum
candies in an approachable manner. The model we investigate can be a valuable
tool for science and engineering educators who would like to help the general
public to gain more insights about quantum science and technology: most parts
of this paper, including many protocols for quantum cryptography, are expected
to be easily understandable by a layperson without any previous knowledge of
mathematics, physics, or cryptography.
