You'll also need some baby yarn and a crochet hook.
The baby blanket pictured here was crocheted using Bernat Softee baby yarn in the "Antique White" color. I think this color and pattern combination is a safe choice for any baby; it'll look right at home in the baby's nursery no matter how the baby's parents have the room decorated, and it's a great color for either baby boys or girls.
Be sure to check out the gallery index to see more color choices, as well as close-up pictures of the stitch pattern used to crochet this design.
This pattern is available in three sizes: preemie, newborn / receiving blanket, and toddler. The sample you see pictured is the newborn / receiving blanket size, measuring approximately 30 inches square.