Brainchild
WordNet
noun
(1) A product of your creative thinking and work
"He had little respect for the inspirations of other artists"
"After years of work his brainchild was a tangible reality"
WiktionaryText
Noun
- A creation, original idea, or innovation, usually used to indicate the originators
- The entire project was the brainchild of a small group of visionaries.