Inclusions are any macro object encapsulated into the silicone of the toy. It may be accidental, such as a small piece of extraneous silicone or fiber, or it may be intentional such as the confetti pours done by many shops. When an inclusion is accidental, it may or may not result in a flop depending on depth and whether it has chemically bound into the silicone. 

A small inclusion in a toy, possibly from a small scrap of silicone being left behind in the mold from its last use.

Future Topics:

Inclusions -> Flops / Not Flops

Inclusions -> Intentional pours

Links to how to

Testing inclusions