Surprised this isn't more popular...
9. Age up whenever with a cake.
Shortly after I got TS4, I wanted a sim with the advantages they get from starting from a child. So, I made a child and his grandfather, an elder. The elder stage is shorter than the child stage, and Grandpa croaked 2 days before the child's birthday. A child can't live alone, so Game Over.
10. What exactly happens when twins are born.
So at this point I'm starting to really get the hang of the game. Starting. Time for this household to have kids. My first baby born playing this, and Mom has twin girls- except, I didn't know that. Congratulations, it's a girl, choose a name! Ok, I'd put some thought into this already, and I had decided if it was a girl I would call her Melody and she would grow up totally into music. I entered Melody, yes keep the last name, click the check. Congratulations, it's a girl, choose a name! WHAT? Come on, not a good time for the game to bug! Melody, keep the last name, CHECK!!!!
It wasn't a bug. It was twins. And now they're both named Melody. And now they're both crying, and I'm trying to figure out what's wrong, and my idiot new mother wants to go admire the artwork on the walls instead of look after her newborns. And I hadn't discovered MCCC yet, so time is flying. And the warning that Melody was very hungry wasn't very helpful, since they were both named Melody. So one of the Melodies gets taken away, and I quit. Recovered the previous save, 2 sim days before. She had twin girls again, but now I knew what was happening and things went a bit better this time.