Divide the children into two teams.
Each team tries to get the other team members “out” by hitting them with a thrown ball. You can play that the thrower is out if the person they threw the ball at catches it. It’s up to you. I usually don’t because it seems to lead to more arguments.
A player cannot cross the middle line unless they are going to Jail.
When you are hit and “out” then you go to your Jail. Your jail is located in a back corner of the opposing team’s play area.
When a player is in jail they are not allowed to handle the balls in any way (throwing, kicking, hiding...) except to simply place the ball across the jail boundary line if one happens to enter the jail.
Whenever team A’s bowling pin gets knocked down for any reason (a B team player knocks it down with a ball or someone on the A team simply trips on it) all jailed B team members are instantly released from jail and can immediately rejoin their team in play. And vice versa for the B team’s bowling pin getting knocked down. Of course, when a player is hit again then, it’s off to jail with them again. Where they will wait until another bowling pin is knocked down or someone wins the game.
Once a bowling pin is down (regardless of the reason) then it stays down for the remainder of the games.