Ключевые слова: activity, background, billboard, blackboard, blocks, board, build, building blocks, bulletin, business, chalkboard, childhood, classroom, concept, construct, construction, create, cube, design, development, education, fun, game, geometric, geometry, icon, joy, kid, label, learn, leisure, mathematics, nobody, object, plank, play, playground, polyhedron, preschool, school, schoolroom, study, symbol, teaching, texture, toy, wood, wooden, write,