Глупый Сима проглотил магнит
Сказал, что он растворился у него во рту. Как конфета от кашля.
Выковырял магнит из пластиковой палочки - детали конструктора.
Классика жанра.

Ingestion of nonfood objects, inadvertently or intentionally, is common among young children and also occurs with older children and adolescents. Unless the objects are large or sharp, they usually pass through a child's digestive system without health consequences. However, the Consumer Product Safety Commission (CPSC) has become aware of toy products containing small, powerful rare-earth magnets* that pose unique health hazards to children. Since 2003, CPSC staff members have identified one death resulting from ingestion of these magnets and 19 other cases of injuries requiring gastrointestinal surgery. This report describes three selected cases and summarizes the 20 cases of magnet ingestion identified by CPSC that occurred during 2003--2006. Caregivers should keep small magnets away from young children and be aware of the unique risks (e.g., volvulus and bowel perforation)
Gastrointestinal Injuries from Magnet Ingestion in Children

Дети в отчете см. выше сначала чувствовали себя хорошо. А через несколько дней / недель рвота и т.п.

Case 3. On May 5, 2006, while using his teeth to separate magnetic pieces from a toy building set, a boy aged 5 years, 1 month, inadvertently swallowed one of the pieces...Two days later, the boy told his mother that he had swallowed another toy, a small metal ball; this did not concern her...On May 30, the boy began vomiting and was taken to the specialist's hospital and admitted. During endoscopy on May 31, the toy pieces could not be removed, and surgery was required. The surgeon removed two disc-shaped magnets, each 10 mm in diameter, from the boy's large intestine and a steel ball, also 10 mm in diameter, from the small intestine and resected the affected bowel. The patient was discharged on June 2.

Этот хоть выжил. Case 1 - нет, две петли тонкого кишечника примагнитились друг к други, перекрыв доступ крови к прямой кишке, дальше некроз, прободение и заражение крови.
At autopsy, nine cylindrical magnets, 6 mm in diameter, were found stacked together in his abdomen. The magnets had magnetically joined across two loops of intestine, causing a volvulus (i.e., twisting of the bowel) that compromised the blood supply to the bowel and led to necrosis, perforation, and sepsis.