My answer to the child would be to talk about another number. The "number" larger-than-100. Is larger-than-100 even or odd? Hopefully the child would realize th

My answer to the child would be to talk about another number. The "number" larger-than-100. Is larger-than-100 even or odd? Hopefully the child would realize that neither of those answers are correct. Then the child will say that larger-than-100 isn't a real number. But it is just as real of a number as infinity (ie. it isn't a number either). However, infinity is one world, and there are no numbers that can be an example of infinity. Larger-than-100 doesn't have those characteristics, so that is why infinity feels like more of a number.