Perfect first day, first activity for your students. A simple getting to know you poster that asks students to write down info about their family, favorite foods, sports/hobbies, what they like and don't like about school and to draw a picture of themselves. Open ended and differentiated to meet all ability levels.
After they are completed, use them to play a getting to know you game so students can meet each other and begin to find things in common, ie. Kagan's Similarity Group strategy.
Use them to decorate the classroom or hallway and personalize the classroom before day two! Title is "Whooooo are you" and includes a cute clip art owl to go along with an owl theme.