By laughing while playing, what were the children doing?
Options:
- learning
- getting tired
- injuries
- having fun
- winning Let's think step by step:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
Children have fun while playing. When children have fun, they express it by laughing. So, the answer is having fun.