Most toddler-types have a favorite stuffed animal of sorts they like to lug around and/or sleep with. More often than not these animals are bears...maybe puppies. There's a kid at Jack's school with an affinity towards a bunny blankie.
Jack has received numerous stuffed animal gifts that could be suitable candidates: bears, penguins, bunnies, giraffes,... you name it... Among all of these, he has chosen a stuffed weasel to be his best friend and crib partner. Perhaps the only kid to have a weasel for a best "stuffed" friend.
He comes by this through his mother - who's preference was simply for a plain blanket which she named of Reddie (guess the color of the blanket!) which she eventually sewed pockets onto.