Here are the three comments about ways to solve the issues: jzwinck - "The article mentions two possible paths forward, but I can think of a third. Make the sp

Here are the three comments about ways to solve the issues: jzwinck - "The article mentions two possible paths forward, but I can think of a third. Make the spheres large enough that swallowing is impractical. 1.75 inches seems to be a standard for this. Would giant magnetic spheres not be fun to play with?" termain - "Why not coat them in an emetic?" rfatnabayeff - "There's a much more safe alternative with almost same possibilities - a kinda "balls-and-magnetick-sticks". In that case, spheres are just metallic, not magnetic. Only joints, sticks, have magnetic ends capped inside the plastic. These spheres are much safer and the visualizing abilities of that toy is almost the same."