An unfinished children's book collaborated with my close friend. It's was originally a story about two plushies, who have lost their tails in a wonderland full of plush animals, picking up each other's lost tails and eventually come across with each other. Unfortunately, the idea wasn't selected by the publisher, so it remains unfinished. I hope one day we would have a chance to finish it.
Also, we made up our characters with fluffy fabric, and make their tails changeable in order to fit the story. Mine is the hare camouflage one.