Creative Toddler Halloween Costume. Babies, toddlers, tweens, and everyone in between: There’s something for every kid in this list of the best-ever homemade Halloween costume. Our Top 10 Toddler Halloween Costume Ideas. Spooky Spider. Grab some black tights and take advantage of the toddler sitting pose for a fabulous spooky spider. Easy Mummy. Up, Up, and Away. ET Phone Home. Ghoulish Ghost. Minion Mayhem.