sentence: Two young boys are standing in the room with two tennis rackets in their hand surrounded by three white walls and a glass wall behind them. sentence: One of the boys then takes the ball and bounces it against the wall and the two begin taking turns hitting the ball back and forth. sentence: After sometime,they aren't able to keep the ball up and one boy starts to bounce the ball up and down on racket by himself. sentence: The game then continues on in the same fashion as the people on the other side of the glass watches them play with each other.