Ключевые слова: art, biology, child, childhood, children, class, coaching, conservation project, craft course, creative, creativity, diy, drawing, drawing course, ecology, education, environmental, environmentalism, grundschule, holiday, holiday camp, international, kids, know, leaf, learn, lessons, natural history, nature, nature conservation, outline, pen, people, plans, primary school, private lessons, pupil, school, summer, summer camp, summer school, teach, tinker, tutoring camp, vacation, vacation course, young,