First day project. "Friendship tree". All students add their print and the teacher hangs it in the room as a reminder that we're all friends
Though not a keyboard or a mouse, the Dr. Suess Classroom Rules Vertical Banner is great for classrooms (and offices!).
First day project: Friend Tree. Everyone puts their thumb print on the tree then teacher later frames it and hangs it as a reminder that we are all friends. I could even use it at open house and let the parents join us since we're all a team.