I LOVE these, mrs.fondleberry! I'm a major control freak, I don't even want my sims playing SSX3 without my permission. I'm definately going to use these.
Simmies - BE WARNED

These are fun. I have more:
1. The "Mob" challenge: Spawn 15 toddlers/children/teens (with the tombstone of L&D) No killing sims! And they stay until they die!
2. The "Going Steady is for hippies" challenge: Your sim doesn't believe in marriage. He/she will woohoo with every sim of the opposite gender in town. Get at least 20 affairs.

Don't know why I don't KNOW this, but: can you create a teen & move to a house, and spawn younger ones - all without an adult? So I would make the teen spawn another teen until he/she finds one they have 3bolts with.

Liked SO much these ideas. I certainly will try some of these. And post on youtube with my current household on TS2.

Yes the teen can take care of the kids. You'll have to kill or move out the adult though if you don't want the adult.

Yep - think of the premade Newson family. Gavin and Ginger are both teens.

Not from CAS you can't, you either need an adult with them that you move out or kill, or you make one of the teens an adult in CAS and then age them back down to teen on the lot.