Health Canada warns of magnet sets previously available on buckyballsshop.com may pose serious health risks - Canada.ca

These sets contain small, powerful magnets that can be easily swallowed by children of all ages, posing serious and potentially life-threatening risks. 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. Swallowing more than one magnet can damage gastrointestinal tissues and can require emergency surgical treatment, resulting in possible long-term health effects and even death.