Use the scissors to cut different sized circles out of the black felt, leaving the sticky lining on the felt for now. Cut approximately 30 spots.
Cut puppy ears out of the white felt, approximately 3 inches long, following the shape in the photo provided.
Put the headband on baby/toddler who will be wearing the costume and measure the placement of the puppy ears. Mark that placement on the headband with a pen.
Remove the headband and heat up hot glue gun.
Fold the puppy ear over the headband at the marked place, using about ΒΌ inch of the top portion of the ear. Use the hot glue to seal the felt ear together, with the headband sandwiched in the middle. Repeat for the second ear.
Peel the black felt spots and place them randomly on the onesie, sticky side down.
The Costume is ready! Take some black makeup and draw a cute little puppy nose on the baby/toddler.
After Halloween, peel off the black felt spots and re-use the onesie!