Combine Matching Multiple Rows Into One Row

IS there a way to combine all matching rows in a table so that it
outputs as one row, for example:

tblMyStuff
UniqueID int IDENTITY
ParentID int
SomeSuch nvarchar(50)
SomeSuch2 nvarchar(50)

Table data:
UniqueID ParentID SomeSuch SomeSuch2
1 1 Dog Bark
2 1 Cat Meow
3 3 Cow Moo
4 3 Horse Whinnie
5 5 Pig Oink

Desired query result from Query:
SELECT ??? as myText from tblMyStuff WHERE ParentID = 3
myText = Cow Moo, Horse Whinnie

Help is appreciated,
lq