Sculpey III comes in a wide range of colors (44 at the moment), including a handful of mica-infused colors (gold, silver, pearl, light pink pearl, and light blue pearl), translucent, and a few glow-in-the-dark colors. Though it is very soft and easily conditioned, it is also one of the weaker clays available.
When cured, Sculpey III is more rigid and brittle than most other brands of clay. This means it is more likely to break-- especially if it is used to make thin sheets or narrow extensions. However, for covering objects or making beads with a more-or-less round, solid shape, Sculpey III should be fine. On the positive side, its softness makes it easy to use with an extruder. It's also easier on those with weakened hands (such as the elderly) or limited patience (such as children). It is also an economically good choice for use with children.