By Jenny Berg Posted September 17, 2013, 8:15 AM EDT
NEW YORK Inspired by the tree-bound elves that represent the Keebler brand, Leo Burnett and City Eventions recently partnered on the Tiny Doors Project, which promotes the snack company. Purposefully under-the-radar, the Keebler campaign has commissioned artists in a variety of cities to carve little, elfin doors into trees around the country; the locations are announced on a Tumblr page. With around 40 iterations in cities such as Kansas City and Orlando, the doors have no signage except for a #tinydoors hashtag. According to AdAge, the doors are nailed into the ground (not actual trees), and planners had to get permission from the participating cities' parks and recreation departments.