I like the phrasing here: peacemakers vs. peacebreakers (as opposed to "on task" and "off task.") Other great ideas here for teaching children different manners and chores. (I like the idea of "Dusty" the dust pan)
This is a "good manners tree" with values on the "roots" (respect, kindness, empathy and patience) and manners on the "branches" (please, thank you, no thank you, you're welcome and excuse me). The tree "grows" (slit the background paper and make a loop and tape it to the tree part) as kids "water it" with good manners.