Funner is a word

Rules Project
    Friends and family usually ask me grammar questions because I  have a degree in journalism.  So yesterday my daughter told me "funner" was a word.   That did not sound like correct information.  Nevertheless, my daughter is right.    "Funner" is a word.   This is an example of  the evolving of language.  Until  recently,  fun  was only  a  noun, according to http://grammarist.com/usage/funner-more-fun/     
Nouns do not have  a comparative or superlative form.   However after reading the website information, I learned that  fun is also an adjective.   The comparatives and superlatives of one syllable adjectives require the er and est endings such as in the word funner.