Dino dreams come true! They’ll light up the night in prehistoric style with our Light-Up T-Rex Costume that’s bound to be a dress-up favorite. It boasts battery-operated LED lights in the spikes on the head for a playful twist to their favorite dinosaur design. It’s crafted from a plush material with whimsical, colorful accents like embossed scales and shimmering foil fabric detail. Its plush material is soft to the touch and will keep your little T-Rex warm and ultra-cozy all day and night long. This whimsical costume is designed by our talented Pottery Barn Kids team who personally make the first sample and plan every special detail. Our costume is finished in garment-quality stitching and construction so it can be handed down to siblings and worn for years to come. Lights up on the horned tail and is battery-operated (batteries are included). Made of 100% polyester. Fabric on front belly is polyester blue printed foil. Costume is filled with polyester fibers and polyurethane foam. Velcro® closure on back of jumpsuit and headpiece. Size 3T Headpiece: 20" wide x 12.5" high Neck: 5" wide Jumpsuit: 13.5" wide (chest) x 21" long (to inseam) Inseam: 12" long Sleeve Length: 18.5" long Shoulder to Shoulder: 10" wide