Eels: What you're thinking of are blending stumps - they are a pencil shaped tool made of hard compressed paper, and they're dipped in a solvent (usually odorless mineral spirits, baby oil, etc.). The Dove blending fluid isn't a solvent, so it won't work for blending pencils... save it for your chalks. More often lately I've been using pencils without blending them - using a lighter touch and layering colors - and I like the results.
Marilyn: you might try the Blick brand pencils
. Buy them individually though, not in sets - it works out cheaper... For just over $40 you can get 58 colors. You can get an idea of the coverage here:
Mama Dini's Stamperia: Pencil Comparison - new