First click download from the site.
It will take you to the zip file from my dropbox. Download.
Next locate the zip file from your downloads folder.
Open and locate the .package file from within the zip folder.
Next navigate to:
Windows XP: Documents and Settings\(Current User Account)\My Documents\Electronic Arts\The Sims 4\Mods\
Windows Vista/7/8/8.1/10 : Users\(Current User Account)\Documents\Electronic Arts\The Sims 4\Mods\
Now cut and paste or drag the .package file(s) into your Mods folder.
Afterwords that should be it. Close all folders and play.