Simplify the following text for a Grade 5 native English-speaking person.
Original: The word bonsai is often used in English as an umbrella term for all miniature trees in containers or pots , but this article focuses on bonsai as defined in the Japanese tradition .
Simplified: One family could have many bonsai , which would grow in pots in the garden outside of the house . A servant might take care of all the bonsai and would learn a lot about how to grow bonsai .