Currently, she's experimenting with plurals:
More than one dog = Dogses
A herd of cows = Cowses
A night sky filled with stars = Starses
Storytime = Bookses
Toes = Toeses
Seeing a trend? Funny thing is that she used to be more correct in her plural usage. Now, she's decided to try -ses at the end of everything for awhile. 'Cause it's fun! We get our kicks where we can.
Or, maybe she's turning into Gollum. "Nasty, tricksy hobbitses . . . "