Neo Color 2 is a water-soluble crayon. In addition to using it as a regular crayon, it can also be used as a watercolor, face painting color, or pastel. After drawing like a crayon, tracing it with a wet brush will dissolve it like a watercolor, creating interesting effects. If you spread the color with your finger without using water, you can create a blending effect like a pastel, or if you apply it to a palette and then pick it up with a wet brush, you can use it like a watercolor. Since it's essentially a crayon, you can of course draw on smooth surfaces like glass, ceramic, and metal.
Water-soluble pastel. In addition to using it as a regular pastel, tracing over areas you've painted with a wet brush will spread the vibrant color like paint.