Bought some fabric at joanns ($9) then cut fabric into strips for the inside and then hemmed the edge:
Then pinned the fabric on the sides with short white pins ($.47):
And finally sewed the last of the fabric into a pillow case and slipped in a pillow:
Here is darcy playing in it. She's still not use to it so we tempted her in with her favorite toy. We woke up this morning though and she was sleeping inside, so i think she's starting to like it.