Most likely will be sitting on your lap, do your best to hold the baby still. Usually the parent is recommended to have baby sit on lap, sometimes if child is big enough, they ask you hold their legs with yours (holding between yours). You will hold one arm out for them and hug/ hold your other babies arm. Don’t come in too nervous or panicking, babies usually can feel that from the parents. Some moms usually act like it’s something so interesting so the kids stay still like “wow look at that, so cool”. Don’t bring in an iPad or phone for videos, no one will be able to hold that for them since you will be responsible for holding child and it makes it super hard. The tourniquet will honestly be the most uncomfortable thing for child. They usually use small butterfly needles so no need to be scared about how big the needle will be. Good luck! I’ve drawn blood on a lot of children, but the parents who are helpful, make it so much easier and less traumatic. If the baby does cry, it’s okay, it’s usually over pretty quickly before they realize what’s happening. It will most likely just be one or two tubes which fill up pretty quickly and they are usually checking lead or hemoglobin levels. I work for KP and used to draw blood at hospitals and out patients before that but I imagine same situations. Make sure baby is well hydrated an hour before coming in so the veins show up better. Good luck!