On April 14 YSO Student Chapter visited Yerevan PhysMath School. We gave a presentation about our main areas of work, followed by an introduction to optical fibers and polarizers as a foundation for understanding the Quantum Key Distribution (QKD) kit. Afterwards, we had a theoretical discussion on the key principles of quantum mechanics involved in QKD. Finally, the students used our kit to send information to each other, applying what they had just learned.