Finger
Try to use your fingers to spoon out some of the sun and you'll come back with just one finger.
Look down at your finger and the burned stumps where the rest of your fingers used to be. It hurts. And you're sad. But at least you still have one finger left.
し
ゆび, さ
None
Don't worry, you aren't the only one out there with just one finger, sheep (し) only have one finger too. I mean, they're hooves, which are really just a single animal finger. It's just big and kind of flat.
Picture sitting with a sheep. It's right across from you, staring into your eyes. It reaches out its sheep finger hoof and you reach out with your finger. They touch. It's magical.