Are The Flintstones Superheroes?

Another great converation w/my 4-year-old, Brady. He told me he wants all the Superheroes on his bday cake when he turns 5, which is not until September by the way. I'm not sure why he was bringing this up now. Although, it was just one of his buddy's bday from preschool, so that probably got him to thinking! So, I told him that was a great idea and asked him which superheroes he wanted to have on his cake. He quickly started the list...Spiderman, Superman, Batman...so far, so good...Ironman...I was surprised he knew all of these...Green Latern, Aquaman...I knew he was running out of ideas...then he paused & thought for a minute...hmmm...wait for it....The Flintstones...what? I started cracking up! He kept going...Chuck E. Cheese...too funny! Last time I checked The Flintstones & Chuck E. cheese were not superheroes...maybe to Brady! So cute!