Expansion Packs add objects and clothing outfits to the game.
One of the three sections in the Game Store is the Specials Section, which contains the Sims FreePlay Expansion Packs.
Unlike the Expansion Packs for the main series of Sims games, the FreePlay version consists almost exclusively of content additions that are theme-based. They range in price from .99 to $14.99 and include the following selections (packs that you have previously purchased will not appear in the store):
Swimsuit Bundle ($4.99)
We have new and exclusive Mankinis and Swimsuits for your Sim's next pool party!
Dolphin Pool Pack $1.99)
Add a splash of Dolphin-themed awesomeness to your pool area with our all new Dolphin Pack!
Premium Home Pack ($4.99)
Give your Sim's home the very finest in living with the Premium Home Pack. Bons: 5 LP.
Tropical Fish Bundle ($1.99)
Be hypnotized by the beauty of Discus and Angel Fish in these two quality aquariums.
Goldfish Aquarium (.99)
The perfect gift for the Sim who has everything. Buy the Goldfish Aquarium today!
Wedding Bundle ($2.99)
Want to get married in style? You need a Wedding Dress and Groom Suit for your Sims!
Dress-up Chest ($1.99)
Play dress-ups! Bumble Bee, Robot, Panda and Dinosaur costumes for your toddlers!
Currency Bundle ($14.99)
Piggy Bank of Simoleons ($32,500 Simoleons) and Box of Life Points (100 LP) Bundle.
Once you have purchased the expansion packs the items that are contained in them are added to your in-game store.
So for example the aquariums will appear under the Pets Tab in the Home Store. Each of the three aquariums (assuming you purchased both sets) will be FREE in the catalog, and can be distinguished by the type of fish that appear in them, which is superimposed on the top of the image of the tank itself in the catalog.
The pet-related packs are particularly attractive to players, which probably explains why they are the top packs in sales - being realistic though that makes sense, because when we are not buying new pets, we are buying new stuff for our new pets. Just saying...
Bear in mind that the list above, while accurate at the time of the guide update, may change over time. This list is intended to provide an example and a sample by which you can judge the content...