Patches or buttons?
Quiet books or play books are filled with life by including moving parts.
There are wonderful novelty buttons / embellishments with child oriented motives, animals, numbers or letters. My collection couldn't possibly be too big. :)
Some of the patches on the picture are labels from clothes. They are woven like ordinary patches and sometimes have surprising pictures on them.
In any case these small hidden elements are always a delight for small children. They don't get tired of searching for these hidden treasures.