I'd apologize for all the birthday themed posts, but as my eldest says "A is so lucky! He has the first birthday of the year!" I love her perspective, and I love birthdays :) Fortunate for you (ha!) you get a shwack of birthday posts to start out the New Year with.
One of the things I love to do for my kids on their birthdays, is to gift them something handmade. I expect that this will only last a few short years before they decide that they are too cool for their Moms gifts. But, as long as they will let me, a handmade gift will be given.
This year for A, I made him a new hat. I realized I haven't knit him a hat since his 2nd birthday, and it was getting much too small. A quick search on Rav for "Robot hat" came up with this gem. I followed the mods other people had done for the child size, and cast on 92 stitches. After completing the hat, I agree that the childs size would have been too big, but the 92 is a big snug on my boy with a 21" head circumference. I would suggest adding in a few stitches in between the robots (and dropping the final robot) to give it a bit more room.
I was also a bit concerned about the length and blocked it quite aggressively. I still would prefer it have a bit more coverage over his forehead. My Mom gave a great suggestion this am of picking up stitches around the brim, adding a couple of inches, and folding it over. I might just do this as I'd like him to get a couple years out of it.
Oh and can't forget the pompom. The last pompom I made (and my first) was a disaster and fell apart. That was about 5 years ago. I thought this hat really deserved a pompom, and used this awesome tutorial. It's a great sturdy pompom that I'm not worried will disintegrate from the top of the hat (ha!). I held all the different colours together and wrapped around my fingers about 40 times. I then shaped it quite a bit to made it nice and thick.
Best part is A loves it!