Ключевые слова: background, boy, cheerful, child, childhood, city, concept, concrete, curiosity, curious, detective, discoverer, discovery, education, exploration, explorer, exploring, eyeglasses, glass, glasses, gray, happy, investigation, kid, learning, lens, little, loupe, magnifier, magnifying, male, nerd, outdoor, people, preschool, preteen, pupil, research, researching, schoolboy, smart, smiling, street, student, studying, urban, wisdom, young,