Health Canada is warning Canadians of the serious danger posed by two magnet sets, Xing da Toy Circular Magnets and Xing da Toy Oval Magnets sold in Canada. These sets contain small, powerful magnets that can be easily swallowed by children of all ages resulting in potentially serious adverse effects on their health. When more than one powerful magnet is swallowed in a short period of time, the magnets can attract one another while moving through the intestines. This can cause the intestines to twist, creating blockages or tearing of the intestinal walls. The results of swallowing small, powerful magnets can be very serious and life-threatening. Swallowing incidents have often resulted in considerable damage to the gastrointestinal tissues and required emergency surgical treatment. For survivors, there can be long-term health consequences.