Cute Idea for first week. Students fill out questions about themselves, attach picture and name in cute colorful font, and put into classbook. Then spend sometime reading each day toget to know eachother. From doodlebug teaching.
Snowball Fight...kids write 3 things about themselves on a sheet of white paper. They do not write their names on the paper. Wad it up and on your command, have a "snowball" (or baseball) fight. At the end of 1 minute, each student grabs the nearest snowball and tries to guess who wrote it. Would be great at the beginning of the year!