Your hands make a pair of antlers when you do the deer sign, so start by extending and spreading out your fingers on both hands. Move your hands by the side of your head, so one thumb touches each side of your head. Each hand should form one antler.
We use deer with story books and flash cards. Having your hands make antlers is a lot of fun for a baby. You can transition from the deer sign into a bit of romping around like a deer with your hand antlers on your head.
Use the animal sign flash cards together and make a game out of it with your baby.