Can anyone think of a reason why Magformers (magnet toys) wouldn't be allowed in a carry on? We're booking a post New Years trip as a gift to the kids (not sure if it will be Disneyland or an all inclusive in Riviera Maya because of the Canadian $) as a Xmas present to the kids and planning some Xmas gifts to keep them busy on the flight, but wondered if there would be a reason strong magnets might not be allowed..