My school is celebrating kindness week by doing kindness bingo on their own throughout the week (those who complete will receive a small candy from me) and through kindness challenges that are discussed on our school morning show/announcements and through fliers that are placed throughout our school. I will share the materials I used for this below, in addition to the TPT link that shows many other great materials that you can use at your school!
https://www.teacherspayteachers.com/Product/Random-Acts-of-Kindness-Week-Tic-Tac-Toe-No-Prep-3002228
https://www.teacherspayteachers.com/Product/Kindness-Week-Calendar-4634341
https://www.teacherspayteachers.com/Browse/Search:kindness%20week/Price-Range/Free
Love for the Elementary Counselor 