What a great positive group activity! Have one person sit on a chair in front of a white board while the others wrote a positive phrase about them. Take a picture to give to each person. A very creative and positive group activity.
Help Wanted bulletin board. Pockets with classroom job descriptions. Write student names on craft sticks and place them in appropriate pocket. Fun and easy way to switch up student jobs throughout the year.
Classroom B-day idea. or just a great community builder mid-year. This is seriously one of the sweetest ideas. If there is no smartboard in your room maybe you could do it with large bulletin board paper. Then they could keep the kind words.