Chick 3 has now learnt not only to wave but also to turn around. It goes to show that they're much smarter than they look!
The other news is that I was wrong thinking that Squid had finishes laying at 6 eggs (which was her clutch size last time.) I checked the box on Monday and discovered that she's laid another two! Of the 8 eggs, 6 are fertile and developing so hopefully they'll have a nice clutch of healthy chicks.