I found a new-to-me art material recently, the Crayola Metallic Extreme Coloring Kit:
Right away, I noticed how bright and vivid the colors were. It was a totally different experience than normal coloring, which was fun. There was a slight delay between drawing a line and the color showing up, which took a few minutes to get used to, but wasn't a bit deal.
The markers didn't respond well if you tried to go over the same area more than once, but other than that, they performed very well.
Overall, I really liked the Metallic Xtreme Coloring kit. Have any of you tried it?