Okay kiddo, so a Buddhist institute in Cambodia is a place where people go to learn about Buddhism. Buddhism is a religion that teaches people to be kind and helpful to others and to find inner peace.
At the institute, there are teachers who are experts in Buddhism and they teach the students everything they need to know about it. The students can be monks, who are people who dedicate their lives to practicing Buddhism, or regular people who want to learn more about the religion.
The institute also has a temple, which is a beautiful building where people can pray and meditate. It is decorated with lots of colorful statues and paintings that show important stories from Buddhism.
In Cambodia, Buddhism is a very important religion and many people find comfort and guidance from it. So, the Buddhist institute is an important place where people can come together and learn about this important part of their culture and tradition.