Ключевые слова: 8 years old, active, asian, ball, caucasian, child, court, cute, development, elementary school student, exercise, fitness, girl, growth, half, health, hobby, japanese, leisure, lesson, lifestyle, mixed race, motor nerves, one person, outdoor, parenting, person, play, player, portrait, practice, quarter, racket, sport, summer, tennis ball, tennis class, tennis club, tennis school, training, wall, wallhit,