I've never attempted to explain how I've done a hat before, but I'm going to do my best since Halloween is fast approaching & I think this little gem would be much appreciated:
For this pattern, I used Red Heart Super Saver. It looks like a lime green, but I think the color name is "Spring Green".
I used an I/9 hook and I honestly don't use a gauge for my hats. I usually just test fit and work more rows if it's too short. (I know I offend the Gods of Crochet by saying that, but I promise, I test gauge with big or very important projects).
A lot of what I did was fooling around & I didn't actually write a pattern so I'll give a general idea of what I did for that.
I'm going to write out the pattern rather than abbreviate so hopefully it will be user-friendly for beginners.Base Hat
First off, you make your base hat. For an adult, I usually increase to 48 stitches.At the end of each round, you will join with a slip stitch & chain three to begin the next round. Chain-threes count as your first DC.
1. Start with a magic ring. Chain three and double crochet 11 times (12 DC). Join with a slip stitch.
2. Double crochet two times into each stitch around. Because your chain-three counts as a double crochet, you would only double crochet once into the first stitch after the chain three. (24 DC) Join with a slip stitch.
3. Double crochet around in a pattern of (2 double crochet in stitch, 1 double crochet in next stitch). I tend to count "1, 2, 3" as I work around the pattern to remind me that I am, in effect, working three stitches for each pattern repeat. (36 DC). Join with a slip stitch.
4. Double crochet around in a pattern of (2 double crochet in stitch, 1 double crochet in next stitch, 1 double crochet in next stitch). I count "1, 2, 3, 4" as I work each pattern repeat (make sure you've only covered 3 of your stitches from the previous round). (48 DC). Join with a slip stitch.
5 - 12. Double crochet around. You will continue to work a double crochet into the first stitch after your chain-3 so you will not continue to have 48 stitches. If you do, there's a chance the hat will end up being too tight and will only fit a child.
At the end of round 12, I had 56 stitches.
Test the fit of your hat. If you feel it's too short, feel free to work more rounds to lengthen it to a comfortable fit.
13 & 14 (OPTIONAL). Using a smaller hook, single crochet around. Join with a slip stitch. I did this to help tighten the fit on the hat, but it's up to you.Brains
For the brains, I didn't write a specific pattern.
I used scrap thread to sew on a basic guideline for how I thought brains should move around.
I then made an embroidery chain (a video can be found here: http://www.youtube.com/watch?v=DGbj_VmcIR0
After I finished the chain, I simply crocheted around, varying between single crochets, skipped stitches, double crochets & shells of 5-9 double crochet.
That's the best way I can think of to explain it. I felt like it should be kinda whimsical since brains don't make a lot of sense.
I then worked a circle of embroidery chain around that and used my green to crochet random shells & single crochet around to look like torn flesh.Eyeball
For the eyeball, I started with "Cherry Red" & then changed to white.
1. Make a magic ring. Chain three & double crochet 11 times into the ring. (12 DC) Join with a slip stitch.NOTE: When you have the last two loops of your last double crochet on your hook, pick up your white yarn & pull finish the double crochet. Cut your red yarn leaving a nice long tail and begin to work the rest of the stitches in white.
2. Single crochet around working a pattern of (2 single crochet in one stitch, 1 single crochet in the next, 1 single crochet in the next). I'm not sure if that's what I did because it's hard to see the stitches, but it sounds about right.
3. Work row two again.
4. Work sc around each row.
5. Begin decreasing. I think I worked a pattern of decreasing every other stitch.
Repeat round 5 until there are only a few stitches left.
Stuff the eyeball with scrap yarn or fiberfill. I used scrap yarn.
Sew your eyeball closed, leaving a long tail. Pull tight & use the tail to sew the eye onto the hat.
Take some black scrap yarn and sew it in an X to make the "missing" eye.
I hope that made sense to all of you. If not, feel free to comment here and I'll try to explain as best as possible. Also, if you feel I made any errors in the pattern, let me know. Sometimes my brain runs faster than I type.