Crayola Write-Start Colored Pencils. They are officially 'intended' for younger kids, but my older kids fought to use them, and frankly I like using them too. I'm missing a few in my set - the set has 8 pencils. I have black, green, yellow, red, and purple, but the set also includes orange, blue, and brown.
Once, at a conference, I got samples of these Ticonderoga 'Core-Lock' colored pencils ([photo below) from a vendor. Their quality is amazing - I personally think they rival Prismacolor in quality and richness of color. Unfortunately, I have just three colors and I don't think they are made any more. Why does the good stuff so often disappear?
Do you have a favorite 'unsung' art material that you think others should know about? Or a favorite material that is simply no longer available?