[he watches her take the cubes out with mild bewilderment -- it seems rung was right that he would appreciate the small gestures, even if he doesn't expect them.]

Thank you, [megatron says neutrally, taking all his willpower not to grunt it out irritably, though he doesn't take the cube yet.] how have you been finding Optimus as a teacher? I do hope he hasn't taken up too much of your time with his being very large and very sad all the time.