Nuria, you can always do different categories from the free library section of Little Reader, there are literally hundreds categories like that you can download - different themes and topics -
http://forum.brillkids.com/downloads/?cat=63From what I understood you are looking for simple presentations where words are shown with photos, right? Just to understand in whichnwa way Doman DVDs were too complicated?
If the speed or word selection is an issue, then showing things in Little Reader probably would be the solution, as you can customize everything making it a perfect fit. Otherwise Doman DVDs ( if you would want to work with DVDs) would probably be one of r best ones out there - simple, clear with no other distractions on the picture/word
Another one to try is Twiddlewink.
Let us know how is it going!