Team of Scouts, split in two. 2 Scouts are given goggles or diving masks to wear. They then have to crawl on their bellies a short course with string/rope criss-crossed a few feet above the ground. They must not go above this height or penalty awarded.
Once through course the team left behind have instructions to a Lego model. They have to relay this over a radio to the 2 Scouts who have the Lego.
Choose somewhere with tree cover so they cannot see each other.
To extend the group left behind can explore another course to find instructions and their radio.