The ball must travel 10 feet or it is a foul. No fielder may cross the playing line until the ball is hit. Player stays on the base until the ball is hit. An inning is over when all the players have batted once. As skills improve it is permissible to have 3 outs per inning.
Standard game is four innings.
Scores are not kept for the younger players. As skills improve scores can be kept to simulate the real game. Safety helmets must be worn. 17 to 20 ounces. Moulded core or sponge rubber centre.