First of all these skeins are TINY. I weighed them and they’re only like 1.9oz / 53g and fit in the palm of your hand. You get 10 of them in the box, so that helps, but that’s still less than 20oz of yarn for almost $40. That pretty expensive for yarn, even specialty/novelty yarn.
Also this yarn is hard to work with. It’s very stiff (possibly from whatever coating or pigment makes it glow?) and takes a little bit of getting used to. Biggest thing is to make sure to keep your tension a little bit loose, especially if you’re like me and prone to keeping your tension too tight. Overly tight stitches are basically impossible to get your hook into with this yarn. I used a 4mm crochet hook for an amigurumi project, but for other things, a 4.5-5mm might be better. It should be noted that the pink yarn was softer, thinner, and easier to work with but also didn’t glow nearly as well.
However the end result was pretty cute. With less than one skein, I made the “bell” part of this cute little jellyfish (see pictures). The sparkly pink tentacles are also glow in the dark yarn from this same brand.
As for the most important feature — glowing in the dark — it’s okay. I didn’t have much luck getting this to “charge” with natural or ambient light. To get it glow nicely I had to “super charge” it by holding it close to a lamp or flashlight for several minutes. Then the white glowed a really nice bright green. The pink part glowed too, but much harder to actually see in the dark - not as bright. The photo shows the red part much better than it was actually glowing in real life. After being “super charged “ the glow last for only 30-40 minutes or so, but that’s pretty typical for this type of thing.
Overall it’s not super impressive, but works well enough that my kids love playing with it. They don’t mind having to charge it up with the flashlight and they love how nice and bright the white yarn glows. The stiff yarn is a little bit difficult to work with at first, but once you get used to it, it’s not bad, and I didn’t have any problems with splitting or unraveling. However it seems very overpriced for the tiny amount of yarn you get. Novelty yarns are usually more expensive but this one seems very high. 3 stars.