Pieces (formerly fan-nicknamed dinglebops) for the collectables strewn about the world. Paul originally refers to them as "money" in Petscop 1 when visiting Amber's room. Pink Tool implies that they are "pieces" of some sort, and that Marvin "... wants 1000 pieces for 'machine beyond school basement stairway'".
When collected, a counter appears in the top right indicating the current count ( 01234). The count is also visible on the pause screen.
They come in several different forms. Every dinglebop is worth one unit — the appearance is just for variety. While they look 3D, they are actually just animated sprites; this is most evident when they're collected in such a way that they 'scale up', as they'll become very pixelated.