Sims 2 - explain the expansion packs to me

[Scooby Doo]

There's also the genetics side to the game and those legacy challenges.

 

[tted]

So this is my collection:

The Sims 2 Celebration! Stuff
The Sims 2 Family Fun Stuff
The Sims 2 FreeTime
The Sims 2 Glamour Life Stuff
The Sims 2 H&M® Fashion Stuff
The Sims 2 IKEA® Home Stuff
The Sims 2 Kitchen & Bath Interior Design Stuff
The Sims 2 Nightlife
The Sims 2 Seasons
The Sims 2 Teen Style Stuff
The Sims 2 University
The Sims 2

There's two kinds of expansion packs: Feature and Stuff.
Basically you want to load the last Feature which in my case is FreeTime.