2414. Playing with old markers

Since my watercolor set isn't compatible with my fountain pen ink, I dig around my toolbox to search for alternatives. I had some fabric paints for some projects a few years ago, and my twisted crayons too. But then I found this old markers (not mine) that I just dumped in the toolbox altogether. I took it out, and was pleasantly surprised that all of them still work just fine! So, I played with it...