I've found that using the book, Have You Filled A Bucket Today? is a great initiative for behavior and kindness in the classroom. The first image on the page is a "bucket" for kids to write their name on and decorate. Underneath are templates for "bucket fillers" for students to write kind things to one another to "fill their buckets". Cut out the "buckets" and staple or glue them onto a board to make pouches for each student to receive messages during the week, and have the "bucket filler" templates available for students to fill out!