Put a special treat (that is prewrapped) with your child's breakfast. Tell them to take this with them to school as a reminder to do something extra sweet for someone else. They could even give that special treat to a friend. Tell them to not eat it until the job is done! Remind them to be kind to others because God is kind to them.
Go through your closet, toys, or pantry and fill a bag to donate to a local cause. As you are in the car on your way to donate items ask your child, "How do you think these items will show kindness to someone else? What does it feel like to be kind to someone you won't ever meet? Why should we do this?"