Ключевые слова: activity, art, athletic, athletics, background, ball, blackboard, chalk, chalkboard, circle, circular, compete, competition, competitive, design, draw, drawing, equipment, exercise, flat, game, graphic, green, hand drawn, health, icon, illustration, image, inflated, isolated, item, leather, leisure, line, one, outline, play, recreational, round, sketch, sphere, sport, sports, team, teamwork, tournament, volley, volleyball, white,