Young engineers aged 10-12, with the support of their dads, will build models of a pendulum. The class will take place as part of the "Dad's Day" series, designed for engaging leisure activities for children and parents together. This time, the guests of the master class will dive into physics. They will assemble models of Newton's cradle-a mechanism made of metal balls and strings. This simple yet striking pendulum illustrates the laws of conservation of momentum and energy. The class will help spark students' interest in scientific disciplines, while allowing parents to refresh their knowledge and apply it practically alongside their child. Participants will take home the finished cradles, where they will surely want to share their knowledge and impressions with their moms. By the way, the "ATOM" museum has a large-scale Newton's cradle; to see it, one must visit the Atomarium space on a tour. Participant gathering for the master class starts 20 minutes before the session in the museum foyer. To attend the master class, it is important to arrive on time for the gathering. Details are available on the official website.