Toric varieties become very famous among the algebraic geometric community after its first formal introduction by Demazure. One can think toric variety as __ fibration over some certain special region in __. The simplest example that one can think is a sphere as circles fibred over an interval in _. In this talk, I will discuss the basics of toric geometry, and how we can construct toric varieties using the strongly convex rational polyhedral cones. I will demonstrate a certain class of toric varieties known as toric Calabi Yau threefolds.