Santa has a real energy crisis on his hands, and he needs an elf's help to fix his sleigh! The Loungefly Elf Clausometer Light Up Mini Backpack is saving the day by bringing extra cheer to the holiday season. On the front zipper pocket, the Clausometer measures Christmas spirit to fuel the sleigh's engine. Watch as the spirit tracker lights up as you move the dial! Up above, Buddy the elf stands in Central Park as skyscrapers tower into the snowy sky. On the back, Santa waves from his repaired sleigh as Buddy's famous quote appears beside him: “The best way to spread Christmas cheer is singing loud for all to hear!” This festive accessory is packed with childlike wonder and will keep your elf essentials safe on any journey.