Character Pools
So when I started the game with my kids, each played one character. They chose a wizard, cleric, and rogue. Realizing they needed some muscle I played the dreaded DM PC. A dwarf barbarian. To keep things on the up and up, and not to take center stage, I used Charisma and Intelligence as dump stats. He was basically a lump of dumb muscle. He made no decisions other than what to hit with his axe (hint: whatever was in front of him). He talked to no one. He's become a loved and valued member of the party. As they became better players, I introduced some henchmen, which they each took over, a druid, ranger and a fighter. Last session, another NPC accompanied the group, giving me two characters to run, and swelling our party ranks to 8. Too much for me to do, and hard to challenge a group that size. So I told the kids that I wasn't running a character any more. He would be available for one of them to run, and each could continue to run two characters at a time. Both