The new marketing campaign was her brainchild, a truly creative idea.
The startup was his brainchild, an innovative project that changed the industry.
The architect's design was her brainchild, a visionary idea that reshaped the city skyline.
The artist's latest exhibition was her brainchild, an original concept that captivated audiences.
The scientist's research was his brainchild, a groundbreaking invention that revolutionized the field.