Ключевые слова: activity, adhesive, amusement, chalk, child, childhood, cipher, court, distance, drawings, education, elastic material, elementary school, exercise, fiber, fun, game, gray, ground line, gymnastic, hop, hopscotch, jump, marking, meter, number twelve, outdoor, pitch, plastic material, play, playground, raveled, rubber, schoolyard, scotch, sport, square, stage, start, strip, surface, symbol, the twelfth, tilled floor, toss, training, wet, white paint, work out zone, yard,