Shards
it's nothing, until suddenly it's something.
drag the broken pieces into their outline: whole again, the key opens the lock, the bulb lights, the fish swims
Loose, a piece is only a shape, and no single piece is a key. Fit the last one and the thing is whole and works at once: what it is for arrives all together with the final piece, never a bit at a time.
Concepts: repair, recognition.
An interactive you play with one thumb, on Wundr.