What is An object in a wrinkle in time?

In "A Wrinkle in Time" by Madeleine L'Engle, the central object is the tesseract, a four-dimensional geometric concept that allows characters to travel through space and time. This concept represents the ability to "fold" the universe, enabling them to traverse vast distances instantaneously. The tesseract symbolizes the themes of love, intelligence, and the struggle against darkness, as the characters use it to combat evil forces. It serves as a crucial plot device, facilitating their journey to rescue Meg's father and confront the antagonist, IT.