A plant fairy, according to the game in the story, is a person who shouts out something's name and others have to touch it. Let's explore this answer in detail:

1. What is a plant fairy?
- In the game in the story, a plant fairy is a role that one of the players takes on.
- The plant fairy's main task is to shout out the name of a plant, and the other players have to touch the plant as quickly as possible.

2. How does the game work?
- The game involves a group of players who gather in a garden, park, or any outdoor space where there are various plants.
- The plant fairy takes turns being the leader and calls out the name of a specific plant.
- The other players then have to quickly find and touch that plant before the time runs out.
- The plant fairy may choose different plants each time, making the game more challenging and exciting.

3. Purpose of the game:
- The game of plant fairy helps children learn about different plants and their names.
- It encourages children to explore their surroundings and develop observational skills.
- By engaging in this game, children also develop their physical coordination and agility.
- The game promotes teamwork and cooperation as players have to work together to find and touch the correct plants.

4. Benefits of playing the game:
- Learning about plants: By shouting out plant names, the plant fairy helps other players become familiar with the names and characteristics of various plants.
- Observation skills: Players need to pay attention to the plant fairy's call and quickly identify the correct plant in order to touch it.
- Physical activity: Searching for plants and moving around to touch them provides an opportunity for physical exercise and outdoor play.
- Teamwork: Players can share their knowledge and help each other find the correct plants, fostering a sense of teamwork and collaboration.

In conclusion, a plant fairy in the game in the story is a person who shouts out the name of a plant, and the other players have to touch that plant as quickly as possible. This activity helps children learn about plants, develop observational skills, engage in physical activity, and promote teamwork.

In the game mentioned in the story, the 'Plant fairy' is someone who shouts out the name of something and the others have to touch it.