I forget how I was introduced to the concept of a split shirt--I think it may have been a snarky Discord post, with the first examples being AliExpress offerings where the graphics were very obviously printed after the front fabrics were sewn together, and very obviously misaligned with the seam.
The idea of making a split shirt from scratch bubbled in my back brain for a while, and then I realized I had the perfect opportunity to make one for the kiddo from the fabric left after making the previous two pairs of pants--I had been able to eke out a short sleeve shirt for me from the remaining cloth after a previous pair of pants made from a 2 yard pre-cut, so I knew there wouldn't be enough left over to make a traditional sweatshirt from a single color (and the fabric is all wrong for short sleeves.)
So...maybe...this could be the opportunity to try a split shirt?
And then I cut out the pants and it seemed like there might possibly be enough left of each one to make two slim fit sweatshirts for a skinny kid
but
no.
I would not second guess myself and I would make that split shirt.
Which of course brought up the question of what graphics?
I decided this would not be the time to surprise the kiddo and asked for his ideas. I specified that I'd rather not do memes, because, when he is over a meme, he is over it, and I do love him but I don't really enjoy making things that he won't even look at once he no longer finds them funny. (Shrek shirt, I'm so sorry you weren't appreciated longer.) So, yeah, I wasn't willing to do anything related to Better Call Saul (which no-one in this household has ever watched. He just likes the memes.)
Outside memes, he does like his mildly obscure video game characters. He emailed me images of his chosen two: Puyo Puyo Carbuncle and Lego Star Wars Gonk Droid. I made freezer paper stencils and sewed everything together and presented him with this