Yes, you are correct, they are little Opossums.
Aren’t they cute.
Found this:
Opossum DietCorrect - opossum diet is essential for raising releasable orphans and maintaining health in captive adults.
http://www.opossum.org/diet.htm
List of foods for Opossums here:
http://www.squirrel-rehab.org/opossum/moreinformation.html
Now that you have the diet details, are they bringing you a basket of Oppossums?
They are cute and it is rare that one gets to see them so close up.