These are all Greyt stories, thanks for the morning laughs. :-)
Dayo has a very large vocabulary and many things make us laugh. I think the most recent this weekend was when we were getting some Ice Cream and Dayo flew over and asked "Wheres Mine?".
I tell you, these Greys are so smart it's scary at times. The most interesting concept he has understood now in his counting lessons is "Zero".
Always link words and phrases with actions and items. They will understand and get to where they can actively carry on a small conversation in real-time as things are happening. They truly view all those around them as their flock and as such, try their hardest to socialize at our level.