
One day, a little girl named Jill was walking in the park. She was very happy, skipping and singing. Suddenly, she stumbled on a rock and felt saying "Ouch!". She saw her friend Mary passing by and stopped her.
"Hi Mary," Jill said, feeling a little embarrassed.
"Hi Jill! What's wrong?" Mary asked.
"I stumbled on this rock," Jill said, pointing at it.
Mary smiled. "That's okay, sometimes we stumble on things. Come on, let's go find a fun place to play together," she said. 
Jill and Mary went and played at the playground. Jill had a lot of fun and felt happy all day. She never forgot her tumble, but it was okay, because she had a good friend to help her up.
