A collection of various experiments and observations that children can conduct independently or with the help of adults. Various sections of biology, physics, geography, astronomy, etc. are affected. The level is shallow, the purpose of the experiments is not to give systematic knowledge, but to arouse interest and demonstrate interesting facts. Designed rather for younger students, and even preschoolers. The language is accessible, partially adapted to the realities of Russia. For parents involved with children, circle leaders and teachers.