Tempest in a teapot.

From little acorns mighty oaks do grow.

Be not afraid of growing slowly, be afraid only of standing still.

The man who removes a mountain begins by carrying away small stones.

Men trip not on mountains, they trip on molehills.

Little pots soon run over.

He that will not stoop for a pin will never be worth a pound.

Do little things now; so shall big things come to thee by and by asking to be done.

Just a drop in the bucket.

It’s chicken feed.