Carry is signed a bit like bring, so be careful not to get the two confused.
To sign carry, take your two flat hands, palms facing up. Motion them together from your dominant hand side to the front of your body, bobbing them up and down simultaneously three times as they approach the center. It is as if you are indicating that you are carrying something along as you walk or ride a vehicle.
Teach your baby or toddler the carry sign in the context of carrying or taking something - or your baby - somewhere.
Teach your child this sign when you are showing them that you are carrying something, or when you are teaching them to carry something themselves.