Although their descriptions were in English, this could have been done in Italian as well. Students can create objects that allow them to practice command forms and prepositions. The types of activities that can be created for a MOO are limited only by the imaginations of the teachers and learners. One can hardly imagine a classroom or homework activity that cannot have a parallel MOO activity designed around it. This writer's experience with using MOO in foreign language classes has demonstrated that it is the ability to connect with native speakers and other language learners that is the most appealing aspect of MOO, so teachers would be wise to include interaction with other users in their plans as often as possible.
Conversation is free-flowing and authentic.
It is thinking, in writing and in the target language, but in response to another human being. The greatest appeal of MOO is the endless variety of human response and the social nature of the learning experiences. In no other way can teachers provide learners with language more authentic without sending them to the countries of the target language. At relatively little expense, and 24 hours a day, learners can be in contact with native speakers from a tremendous variety of cultural and linguistic backgrounds. It's better than that found in any textbook.