Even as a well educated adult, I still find that I love pointless stupid shit. Sometimes me and my friend that I grew up with would do things like stacking Sofa Cushions and jumping over them, or things like being in the backyard and breaking things for the hell of it. Is this normal?

I love Calvin and Hobbes! Too bad the creator died in the 90's. You must have some kind of Tiger Fetish or something :)
Sometimes even the most simplest of things make people smile.
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Another time I spent 1/2 an hr setting up a radio so that I could run over it with my motor bike, good fun.
Think I should gone into demolition !
Another one I love is watching people fall over , ever take any notice of that , looks that funny if you stop and think about it.