Which sentence is punctuated correctly?

Before beginning your project, make sure you purchase all the items you will need, colored pencils, drawing paper, and a ruler.

Before beginning your project, make sure you purchase all the items you will need: colored pencils, drawing paper, and a ruler.

Before beginning your project, make sure you purchase: all the items you will need colored pencils, drawing paper, and a ruler.

Before beginning your project, make sure you purchase all the items you will need: colored pencils: drawing paper: and a ruler.