From the point of view of a baby or dog, more-or-less anything that gets a good yell from adults when munched. Suitable examples are: RemoteControl boxes; any divisible portion of a parent; and mains electricity cables.
-- JonGreen
Q. [Anonymous] Um, what's a "divisible portion of a parent" ?
A. [JonGreen] That which, with a suitably powerful munch, can be severed.