I should add about the geographic tongue thing that my daughters ended up being from hypothyroidism and not absorbing B12 properly, but it was 10 years between the tongue Dx and the thyroid. however, it can have many causes, is an inflammatory response to internal or external factors, is not contagious, and even be temporary in some people. So, if foods are tasting different to you or your kids will only eat 3 diferent foods all of the sudden, give your tongues a look see, the more you know, there you go.