I found this super cute tutorial for a crochet hook holder on Craftster and whipped one up for myself.
closed approx. (6 1/2 x 5 in.)
tri-folded with flap open (approx. 8 3/4 x 6 1/2 in.)
close up of little pockets
I sewed mine in three different sizes based on the size of my hooks
approx. 1/2", 3/4", 1"
This pattern could be altered to hold any number of things: crayons, markers, pencils, knitting needles, paint brushes. The folded size is compact enough to be tossed into a bag or purse. I've even tucked a small skein of yarn into it so I have crochet-to-go. If you ironed on some vinyl it would be great as an art kit for the kiddos.