I want to add a hood to a sweater

I am knitting a sweater for my friend’s baby. It’s just a basic cardigan but I would like to add a hood. What is the best way to do this? Has anyone done this before?

Thanks,
Marilyn

You can pick up sts around the neckline and knit a square then BO with a 3 needle bind off.

Ahhh, I see. Thanks for the help!

Marilyn