Remember Bucky Balls, those ridiculously-fun-but-ridiculously-dangerous-if-ingested magnetic spheres that could be sculpted into a variety of shapes and structures? They’re unfortunately still banned, but Zen Micromagnets are not. These 2.5mm neodymium magnets are half the diameter of Bucky Balls and comparable magnets but skirt the ban thanks to their reduced individual magnetic strength, attaining CPSA compliance. Because they’re tiny they’re a bit more of a challenge to work with though they make up for it in numbers: 432 magnets cost just 25 bones while a ludicrous 1728 will run you 84. Just remember to keep them out of reach of children and to not swallow any yourself.