the 38 build/buy items listed here ( you can click on each pic to see what your looking for in the buy/build mode )
http://simsvip.com/game-guides/sims-3-movie-stuff/
edit typo
to make your own collection folder go to buy mode then click on collection folders-select make a collection folder choose an image then
1. Open a game.
2. Make the collection. Name it Movie Stuff then add the items to the folder from buy/build mode
When you select an item you will see a add to collection
3. Exit the game.
4. Go to Documents/Electronic Arts/The Sims 3/Collections/User
5. Sort the files by date
6. Rename the last .package file to match the collection you just made. Movie Stuff It will be a long jumbled mess that looks kinda like this: coll_0x2d00476387eo.package. Now it will be named Movie stuff
note for step 6 take a rough idea of the time you make the folder so you can rename it in your the electronics arts/thesims3/Collection/user
the time and date you made the collction folder at will be in the list of collection folders
image1 to give arough idea of how to small medium and large arrows the steps to take large arrow select an icon for your collection folder and name it once named tick accept
image 2 how to add to the collection folder select something in buy mode then select the add to collection folder which will open up the folder with the icons on it select your icon yo choose for the folder the item will be added to your folder