This specifically is called a baseball cap and it'll go on your head like that and they also have different kinds of hats like a baseball cap, a sun hat, or a beanie or a winter hat.
When you knit with two needles you can put the thread or the wool around your needles in different ways, so that you get different patterns in the wool.
Hermione, who of course was up to date with all her work, brought more wool outside with her and bewitched her knitting needles so that they flashed and clicked in midair beside her, producing more hats and scarves.
He noticed that when he put various coloured balls of yarn out in his garden, almost always one and only one became popular that season for incorporation into local birds' nests.