I finished this a couple weeks ago for my little one. It's been SO COLD this winter here in WI and he doesn't like to zip his jacket up all the way or keep his hat on. I thought a helmet was just the ticket! I hadn't knitted in quite a while (since he was tiny baby!) and this was my re-initiation to knitting (or should I say re-addiction??!).
I used this pattern
but made the ribbed neckwarmer part just a bit longer. I wanted it super-cozy, so I used Lion Brand Chunky WoolEase on #8 needles. It ended up very thick and tightly-stitched... just what I wanted.
My son is in daycare, so I learned how to do chain stitch and put his initials and a heart inside. Of course, since I finished it, we've had a thaw and he hasn't tried it out yet... just ran around the house in it.
P.S. As a result of this hat helmet, in the past few weeks I have made a sweater vest for him, Knitty's Calorimetry OTN for me, and have four patterns waiting for attack!