See Lesson kits below (KS1 for ages 5-7 & KS2 for ages 7-11) for World Gratitude Day.
More details available here.
KS1 & KS2 RESPONSIBILITY 10 - Gratitude with The Big Think Questions: (KS1) How do you try to be thankful for small things? (KS2) Do you express gratitude to the people around you?