Kids & Teens will be a parenting in free-roams for both players.

Player 1 gets kid1 and teen1
Player 2 gets kid2 and teen2

Type code

"kid1" place in front of you to dismiss it by typing it again. Typing "hit1" to fight kid2 when he's there (broken) CJ (AI Controlled) and kid1 fight each other.

"Kid2" Requires second player (It follows player 2) type to dismiss. Typing "hit2" to fight kid1 when he's there (however it doesn't work)

"teen1" place in front of you to dismiss it by typing it again. Type "gun1" will get him random weapons.

"teen2" Requires second player (It follows player 2) type to dismiss. Type "gun2" will get him random weapons.

Note:
If each kids get killed by you, gangs or getting run over by a car, you'll get 3 wanted level stars.

They could also swim in water.

This will require to use player 2 for kid2 and teen2: http://www.gtainside.com/en/sanandreas/mods/107212-improved-2-player-model-selection-new-animations/