Kids bedroom featuring a Hulk - Avengers Assemble Fathead wall decal! If you're looking for the right Marvel’s Avengers Assemble gift, Fathead has the perfect wall art present that is better than any old poster or sticker. Our Hulk – Avengers Assemble Fathead Wall Decal is perfect for a birthday or just because. Fathead of Hulk is huge and it stays up on its own with a low-tac adhesive that won’t damage your walls. You can also move it and reuse it.