They are alcohol markers. The colors are a bit different, and depending on the maker, come randomly. You also have to get your own case or holder if you want them organized in most cases. But they're pretty great otherwise. I also almost forgot about Spectrum Noir, which produces nice, if sometimes overfilled alcohol markers. My niece and I haven't had any problems with them, though. The colors can feel a little "childish" sometimes, but they were originally made for crafting types and not super finicky artists like you and me. XD The same brand, Crafter's Companion, did come out with some nicer markers and much nicer colors for each of the two types, named Design and Illustrator. Illustrator comes with brush nibs and chisel nibs, Design has bullet nibs and chisel nibs. Spectrum Noir, and probably the other two alcohol markers Crafter's Companion has, sells in most of Europe and the US. I can't remember if they sell in Belgium, though. They also have these "watercolor" markers, but from what I understand, they are garbage. XD They (the good ones, not the garbage water-based ones) sell on Amazon for about $1.50 - $2.00 (USD) each if you buy them as sets. :3
You and I are only like 3-4 or so months apart in age, lol.