Arya Samaj is an organization in India that was started a long, long time ago by a man named Swami Dayanand Saraswati.
Swami Dayanand wanted to help people live good lives and be good to each other. He believed that everyone should have access to education and knowledge so they could make wise choices.
He also believed in a certain set of values, like honesty, kindness, and hard work. These values are called 'dharma' in Sanskrit, which is an old language from India.
The Arya Samaj organization teaches people these values and helps them live their lives according to them. They also have ceremonies and rituals, like chanting mantras and discussing scriptures.
Overall, the Arya Samaj is about living a good life, being kind to others, and following a certain set of values called dharma.