Pentel Art Crayons are soft crayons that go on smooth and moist. You can use them to make pictures that look like oil paintings. They leave little crumb when you color.
There are 24 colors, plus a colorless blender for mixing colors together. Sets come in 8, 16 and 25 colors (the 25-color set has 26 sticks, with 2 whites). Each color is also sold individually.
The colors are easy to mix and blur together. You can also put light colors over dark ones.