COVENTRY, R.I. — Ruby is two feet tall. She has childish eyes with tiny black pupils and irises that change color with her mood. And she knows how to have a conversation, make jokes, fist bump and ...

Is there a single kid out that who, at one time or other, didn’t wish their teacher was a robot? Well, thanks to a team of engineers from the Wyss Institute for Biologically Inspired Learning at ...