Mostly animated PG film has gross-out humor, violence.

The plot's so much old rote, and the characters have all the personality of protoplasm; but the anthropomorphising of this microcosmic metropolis is wonderfully imaginative, and the dialogue decidedly spiffy.

The ideas are there, hints of genius, but no one ignites them.

It's imaginative, ingenious and dramatically flat. Still, it may satisfy his who will learn a lot about the nasty effects of junk food on the human body.