Good idea...

I have these in pencil crayons, they are okay, not great if you are trying to colour in small details.
I also have these in crayons, great for kids, they don't get their hands all messy!

We have 3 little ones in our house, and we love all things Crayola! I got these Crayola Twistable Colored Pencils in a 24 pack, and purchased a set of 2 for my boys on Amazon for less then $5, including shipping! I thought this was a great value! We like that they twist to "sharpen" and we don't have to look for a sharpener each time! We also like the clear barrel for the color, it is a fun feature my children like! I was a bit disappointed in the smoothness of how they write. The color is also not as vibrant as I would of hoped, and expected with Crayola. After some manipulation from curious little fingers the "twist" part get jammed, and often will not work after that, though once in a while we can get them to work again. We love Crayola and suggest you try them to see if they work for your liking! We will probably not purchase again, but will use and create with them while we have them!