I made this for a Christmas gift this year. The pattern in Simplicity 5151. Grandma is always crocheting and she totes her projects around in a plastic grocery bag. It isn't a large as I would have liked but it will work for a smaller project, or the start of a project. Her most common projects are lap robes and prayer shawls that won't fit in it when she gets about half way done.
This is a crochet hook and scissor holder. This is two pieces of fabric sewn together with a piece of interfacing in the middle. The bottom is folder up the height of a standard crochet hook. Sew several little "pockets" for hooks and then on the other side leave a larger space with a "V" sewn in the bottom to hold a scissor. The top is folded down and pressed to create the flap. For a knitting needle caddy just make it longer.