I know, its crazy but i actually found a crayola product that is worth buying for art...
I work at Staples office supply and i saw that crayola brush pens were going on clearance so i decided to pick up a few packs and test them out.
I was quiet suprised to see that they were VERY nice to draw and sketch with.
Unlike their normal paint brushes and materials i felt that the quality and usability of this product was worth sharing.
When it comes to brush pens i am usually a big pentel fan just because of their name and prestige. But i like that these crayola ones are very cheap (about $2.50 for a pack of 4) and their tip is nice and flexible yet firm and doesnt lose its tip.
The ink is waterbased and doesnt smear or bleed (which is nice!)
anyways, i think everyone should go out and buy a pack and test them out. they are really cheap and i think you can get them at most places that sell crayola products. they are cheap enough to not feel guilty about using and abusing!
hope this helps!