Kids often get an upset stomach when they eat something they shouldn't. But for an 8-month-old baby girl named Aunraya, the consequences were nearly deadly, says ABC News. The baby recently ate what her great grandmother and guardian, Freida Deweese, thought was "a piece of candy," and wound up in emergency surgery at Texas Children's Hospital. That's because the child hadn't eaten sweets — she had swallowed a Water Balz toy, which begins around the size of a marble and grows to up to 400 times its original size when placed in water. Here, a dangerously expanding toy and six other strange objects found in the stomachs of patients across the globe:

1. A perilously growing toy

By the time Aunraya was rushed to the hospital, she was vomiting bile and suffering painful constipation. The gel ball had grown to 3.5 centimeters and blocked her small intestines. Water Balz's distributor, Dunecraft, says the toys are not meant for toddlers, but the doctor who removed it, Oluyinka Olutoye, says this kind of toy is becoming so prevalent that it's time to sound an alarm. "While they are fun and make good science projects," Olutoye says, "[they] can have disastrous consequence when ingested."

2. A felt-tipped pen

In 2010, a 76-year-old British woman checked herself into a hospital in England with complaints of diarrhea and weight loss. When doctors examined her, they found an unrelated problem: A felt-tipped pen that had been stuck in her stomach for 25 years. The patient recalled having used the blunt end of the pen to "inspect a spot on her tonsils when she slipped, fell, and accidentally swallowed the pen," says ABC News. Not only had the pen caused her no problems — when doctors "fished the pen out of its gastrointestinal hiding place, they found that it still wrote clearly."

3. 78 pieces of cutlery

Surgeons in the Netherlands were "flabbergasted" in 2009 by the case of 52-year-old Margaret Daalman, who checked into the hospital complaining of a stomach ache. X-rays revealed 78 distinct pieces of cutlery — literally "dozens of forks and spoons," says Britain's Daily Mail — which doctors were forced to remove one by one to save her life. Daalman reportedly suffered from a rare personality disorder that caused her to consume utensils whenever she sat down for a meal.

4. A 10-pound hairball

A "massive" hairball was found in the stomach of an 18-year-old girl in Chicago in 2009. She had been complaining of stomach pains and vomiting, says Fox News, and over the course of a five-month period, the girl lost more than 40 pounds. Doctors say she suffered from a strange psychological condition that caused her to eat her own hair. The hairball doctors fished out measured 15 inches by 7 inches by 7 inches. The young woman has since stopped eating her own hair.

5. An entire magnet set

Haley Lents, 8, of Indiana ingested 20 steel balls and 10 magnets in 2009 because "they looked like candy." The pieces were part of a Magnetix construction set, which Haley had somehow managed to swallow while her mother was in the room. Her father told CBS News that Haley is a smart girl who typically "get's A's and B's," and that he didn't understand how the magnets ended up in her digestive tract. Haley recovered after spending two weeks in the hospital.

6. More than 400 coins

Over 13 pounds of coins and other iron objects were found in the belly of Kuleshwar Singh, 28, in November. At first, sonography and X-rays didn't reveal anything other than "intestinal blockage and a few lumps." Doctors still opened up his stomach, and found 421 coins, 197 fishnet pellets, three keys, and 19 bolts from a bicycle chain. Doctors suspected Singh suffered from schizophrenia and a rare condition called pica, which "creates an unusual desire to eat non-nutritional items."

7. A man's twin brother

Sanju Bhagat, 36, of Nagpur, India, had been teased his whole life because of the giant bulge in his belly, which made him look like he was "nine months pregnant." One night in 1999, he was rushed to the hospital in pain, and doctors decided to operate on what they suspected was a "giant tumor," says ABC News. But according to Dr. Ajay Mehta, what they found was much more frightening. "To my surprise and horror," says Mehta, "I could shake hands with somebody inside." Indeed, there was a "strange, half-formed creature that had feet and hands." Bhagat suffered from a rare medical condition in which the fetus of his twin brother became trapped inside him while he was still in his mother's womb, surviving for decades as a parasite by leaching blood, complete with an "umbilical cord-like structure."

Sources: ABC News (2, 3), CBS News, Daily Mail, Fox News, Hindustan Times

This article — originally published on Dec. 22, 2011 — was last updated on Sept. 18, 2012.