It's definitely one of my favourite bonding moments, when I'm at the computer and I hear a 'pip pip' sound from the playstand at my right shoulder. I look across and there's a Birdy waving at me with his left footie, pleading for a cuddle!
If I ignore him, he will give up after 5 minutes and head over to his happy hut, where he will spend the next 10 to 15 minutes grumbling and squealing softly. I think he also purposely sticks his tail out of the back of the happy hut as far as possible just to let me know it's not as comfortable in there!
Alternatively, if I oblige and pick him to tuck him under my arm while I work, he'll grind his beak happily instead of grumbling. This time it only takes a minute before he's stopped and fallen asleep!