The two brown ones are mallards names Barry (from the Bee Movie, because apparently he looks like a bee), and Buzz (as in Lightyear). The yellow ones will grow up to be white, and they are named Donald and Daisy.
Kade loves holding them, and isn't afraid to pick them up.
I love this pic of Kade and his Daddy
Ky isn't so sure about holding them, and his nervousness keeps him from grabbing a duck as it runs away. But he still loves to watch them, and I think he wants to want to hold one.