Little People

"The Little Couple" star Jen Arnold is a free woman ... free of the cancer that wracked her body.

We got Jen and hubby Bill Klein in NYC ... and they revealed two major spoilers for the upcoming season of their TLC reality show -- including the latest on her battle with stage 3 cancer.

Jennifer Arnold and Bill Klein -- stars of TLC's hit "The Little Couple" -- just adopted the cutest little boy from China ... and like any sized parents, they have quickly learned ... TODDLERS POOP A LOT.

Our photog spoke to Jen and Bill on the streets of NYC as they walked hand in hand with the newest addition to their family, 3-year-old William, who was also born with a form of dwarfism.

It's clear from the video the new parents -- who struggled for years to have a kid -- are excited to learn the tricks of the trade.

Little people are NOT objects to be greased up and hurled down a bowling lane for the sick enjoyment of an audience -- so says the Little People of America, which tells TMZ, Zac Brown's "midget bowling" is a "direct insult" to little people everywhere.

You'll recall ... TMZ posted footage of country singer Zac Brown going "midget bowling" at a motorcycle rally in South Dakota last weekend -- sliding a little person named Short Sleeve Sampson down a greasy ramp ... and into bowling pins (he got a strike).

But a rep for Little People of America -- the country's biggest non-profit for people with dwarfism -- tells TMZ, "Little People of America does not endorse any activity in which a person of short stature is used as an object rather than regarded as a competitor, in a 'sporting event.'"

The rep adds, "We believe that such practices are a direct insult to the equality of people with dwarfism, grounded in a respect for basic human dignity."

But tell that to Short Sleeve Sampson -- he called in to TMZ Live earlier this week ... insisting there's NOTHING wrong with a little "midget bowling" every now and then.

Bill Klein and Jen Arnold (aka TLC's "Little Couple") weren't kidding when they told us they got a giant Christmas tree this year -- it really is 16 feet tall!!!