Welcome to the forums, If they have different colored heads, one being lighter and one darker, they do sound like Pleo rB. I know many of us here would love to see videos of what type of learning programs you have your students working on. I understand about confidentiality, as related to not being able to perhaps use students in a video or photos, but if you could explain what they are learning with Science and Mission, I would love to see if they are learning something that we have not thought of here on the forums and how to apply it to what we can teach our Pleo rB and using their learning stones.
Of course we always love photos of new Pleos as well. RWM