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Free Printable Elf on the Shelf Mission Impossible Envelopes and Mission Cards. The ideas for inside are cute. Things like "Give your Mom a hug when she needs one" and "find someone who is alone on the playground and invite them to play with you and your friends." They have blank mission cards too so you can create your own!
This is such a cute idea! My boys got Elf on the Shelf last year right after Thanksgiving. The boys get so excited to wake up each morning to see where the Elf was sitting that day. It was also a great way for the boys to remember to be good and kind to each other because the Elf was watching and reporting back to Santa.