This is a great way to get your students interacting and talking with each other. After introducing yourself, tell the children to get up right away and line up in order of their birthdays. For a challenge, give them a time limit. You could play it again only the second time they'll need to line up alphabetically by their last name. It might be a little chaotic, but you might see some leadership skills take over.
Another great way to get your students interacting is to play bingo. Print blank bingo cards and hand them out. Tell the kids to walk around the classroom and ask their classmates to fill their names in the boxes. When they are finished, you are ready to play bingo by calling out the students' names. Offer homework passes as prizes.
Print each student's name on a sheet of letter-size paper. Hand the sheets out to the class and give the students a few minutes to decorate their paper. Keep the personalized nameplates displayed on their desks until all of the students have become familiar with their classmates' names -- or even keep them on the desks all year long.
Give your students some art supplies and a few minutes to draw a quick self-portrait. Ask them to leave room on the bottom of the sheet to write their name, favorite subject, color, food and one fun thing they did over summer vacation. When they are finished, have each student stand up with the completed picture and read it aloud to the class. This way they can introduce themselves and already know exactly what they are going to say.