Not sure by what you mean "interact with map", and "enlarge certain sections".
If the users wants to simply update map document scales and extents then:
Map Package will do the trick. This includes map document and related data. Map packages can be shared via ArcGIS Online, email, or ftp and extracted out to map document and related data source(s). Users can make adjustments within the map document and re-package and share again between users.
If the user wants a truly non static view of the data (for viewing or editing):
Then you will have to host the data via a map service (WMS or WFS).