This is one of my favorite stress balls. Its squish feels really nice. It is a little sticky and collects fuzz, but washes easily (a little talc might help- I haven’t tried it). My 3-year-old granddaughter loves it and is happy to give it a bath when needed. Only the skin glows (not the goo inside) and the glow doesn’t seem to last a long time, but you can draw on it with a small flashlight and then distort the images by squeezing it, which is fun. I’ve had it a few weeks and my granddaughter hasn’t killed it yet, despite constantly trying to jab her finger through it, so it’s relatively sturdy.