And I thought of something else-- full bellies and empty bladders before bed! Toddler beds all have very low comfort ratings, I guess to make them sleep a lot. This means they'll sleep a long time, so you don't want them to use their diaper and delay potty skill gain, or getting so hungry you get the threatening message that they're very hungry and could get taken away.
And maybe you'll get a laugh out of my first experience with babies in TS4:
So Mom gets pregnant, and I gave a little bit of thought to what to name the baby- if it's a girl, I'll call her Melody and have her be very into music. The big moment arrived, sure enough it's a girl, and I entered Melody in the first name field, kept the last name of course, and... the box popped right back up. WHAT?!?! This is NOT the time for the game to glitch out on me! MELODY, same last name, click the check!!!
Yeah... not a glitch. It's twins. And now they have the same name. And both Melody's are crying, and their parents are morons, and I've never done this before so I don't know what they want. And I haven't discovered MCCC at this point, so time's flying by at the default rate. And the parents are trying to do random things like admire the paintings. And the notification that Melody was very hungry didn't help much, since they're BOTH Melody. So one of them gets taken away, and I no-save quit.
That set me back a couple of game days, not too big a deal. And Mom popped out twin girls again, but this time I knew what was happening and gave them different names, and had at least some idea how to take care of them.