The creeper's blocky geometric shape makes this a great beginner project for people unfamiliar with sewing. Also it's your best shot at giving a creeper a hug without it costing you the north wall of your house.
Step 1: That's a very nice EVERYTHING you have there...
Erasable Marker - you can find one made especially for fabric at any craft store
Fabric Shears - Aka big ol' pair of scissors
Green Fabric (fleece is good) - About half a yard should do, go to the fabric store if you don't feel like punching sheep and cooking cacti
Matching spool of thread
Fiberfill - Stuffing
Either black embroidery thread or black fabric scraps