I am sure this could be used in a larp somehow
loc8tor.com/product_informat … d=40&cid=5
Tag Size: 30.5mm (H) x 19.5mm (W) x 8.5mm (D) Weight: 5 grams
Pretty good price too for the basic version. us$
loc8tor.com/product_informat … =96&cid=18
Kit with locater with 2 tags