... , two balls. Material: PP Plastic The crowd: middle school students, middle-aged, the elderly etc Whirlwind changeful ball is a new kind of ... magic.2. Double play: see who threw a prospective, good catch.3. 3-6 team play, each in 8 * 10m range ... of venue for the stadium, between5-8m distance, mutual cast on the other side, which side good catch and throwthe prospective for ...