
Billy and his friend were having lots of fun playing together. They had been running around in the park all day. Eventually, the sky grew dark and they had to go home. Billy's friend ran a little faster to get home before it started to rain. 
When they got home, Billy noticed that his friend had left something heavy on the ground. He picked it up and ran to catch up with his friend. When they got to his friend's house, he thanked Billy and said, “You’ve been such a good friend today – thank you for carrying my heavy backpack home!”
