I actually say there names then "booboos" which is guinea pig for 'I've got something for you, come and see' Am I mad? Yes possible @)
Not mad, no. I do it too but for a different reason. My boys are free-range in the shed and I don't want to scare them by opening the door and sending them running to their hidey houses. I say 'boyyyys' a couple of times before opening the door and they're usually at the door desperate to see what I have for them!