Goblin: First you will need a green dress, if you don't have one or if you are a boy, green pants and a tatty old T-shirt will do. Then you will need a hack-saw or a sword, and then to complete the outfit, black boots and an ugly mask. Thanks to Emma for this idea. Spider-man 3 New Goblin Deluxe Child The New Goblin Deluxe Child costume includes jumpsuit with attached green shoulder pads and belt. Green elbow pads. Sword sheath and green mask. Available in child sizes 4-6, 7-8, 10-12, 14-16. Shoes and toy weapon (sold separately) not included. This is an officially licensed Spider-Man 3 product. TM & (C) Marvel Comics.