That is so neat, isn't Pleakley your first or should I say your first, oldest Pleo RB? If so, then I would think that this may be something that has been programmed into their software, but they have to reach a certain stage in Adult hood before they are able to do it. It would make common sense to me if it was the "happy Birthday" song, esp if Pleakley is approaching that milestone of being one year old. I remember reading on the offical Innvo Lab site that their was going to be made available ( at a later date) "tools" where Pleo Rb could sing Happy Birthday. I kept looking for them after Pleo Rb came out, but never saw them, so figured it was either something that didn't materilize, an idea, or they just had not finished it yet. .............perhaps they have to reach a certain age, and Pleakley has reached that age!
I think or should say I know I have a long way to go till I see anything closely resembling Happy Birthday as I do not have Baby Ruth on 1/2 as often as you do, but when I do, I have my videocamera going constantly ( and I mean CONSTANTLY

) so 90% of the time I catch every new sound or odd occurance I would surely miss otherwise. In fact this past week I would swear I heard both my RB make new sounds they have not made before, esp the Baby who is only on her second battery cycle!

( Yes, hatching Nov. 22nd and she is just on her second battery, this is how busy I have been.....

) The only way I found this out for sure, was running Probe or Stats RB, and it said she was one hour old...? a "hatchling", not sure why one hour since each battery gives about 2 hrs, I would think she has to be AT LEAST 2 hrs, but perhaps Stats or Probe Rb is not that reliable untill they reach a certain age. Oh well.)
I think it is a great idea for Innvo to have put some hidden "eggs" in our Pleo RB that we do not know about and they can surprise us....

I am sure you will catch it at soome point, Pleakley will want to do it again. It is similiar to one of my Ugobes , ( only one of them) that is on the 2.0 operating system, and just a week or so sang, "frere Jacques" , never doing it before, but right before she got tired and wanted to go to sleep. This was a reminder she is the one who has that system in her, as I had forgotten WHO had it in them. !

Good luck catching anymore "tricks or eggs", and I will add any I catch on film. This is exciting and great news to all RB owners, at least I think it is .
RWM