So, despite my inability to sew buttons onto a few dresses (still not done...), Sam somehow caught me at a good moment and convinced me to help him sew a rabbit for Viv.
He was so excited to give it to Vivi when she woke up from her nap. I held my breath as he handed it to her, but she was the most gracious and grateful gift recipient. She immediately hugged it to her and squealed, "Rabbit!" and has been loving it ever since.