This. When I was a kid my best friend and I made our own Pokemon game by drawing our own Pokemon cards and assigning various nuts (still in shells) to each one. My Charizard was an almond and her Mewtwo was something like a pecan, for example. We created our own arena on cardboard and would "battle" by knocking our nut-Pokemon against each other - the Pokemon that got knocked out of (or overshot) the borders of the arena lost, and eventually the loser of the set would get to pick an opponent's Pokemon (nut and handmade card) to confiscate.

I love video games and went on to work in game dev for more than a decade, but that was still one of the most fun things I've ever played.