How do you build the snake on Lego Harry Potter on xbox360?

To build the snake in LEGO Harry Potter on Xbox 360, first, ensure you have the necessary character with the ability to speak Parseltongue, such as Harry Potter. Approach the snake statue located in the Chamber of Secrets, and interact with it by pressing the appropriate button when prompted. This will activate the build sequence, allowing you to gather the required bricks and assemble the snake. Complete the build by following the on-screen instructions until the snake is fully constructed.