Goody (noun)

1. Something that is especially good or pleasing.
2. A sweet or treat, especially one given to children.
3. A person who is excessively or hypocritically virtuous.

Origin:

Goody is a informal and diminutive form of the word good, used to indicate something that is especially good or pleasing.

Examples:

1. The cake was a real goody.
2. The children were excited about the goody bags at the party.
3. She was always a goody-goody and never did anything wrong.
4. The goody in the story was always kind to everyone.
5. He gave her a goody as a reward for her good behavior.