Step 1: What you need:
Step 2: Cutting the pattern / felt
Step 3: Make the ears
Step 4: Make the ears, cont.
Step 5: Connecting the body
You should have two porcupine sides, mirror image of each other.
Step 6: Connecting the body, cont.
Step 7: Connecting the belly
Step 8: Stuffing the porcupine
Then sew closed using a ladder stitch.