Memory game that the Beavers/Cubs/Scouts have to remember each invisible obstacle in turn and remember them in reverse on the way back. Played in teams.
Obstacle markers such as chairs to help them remember where the invisible obstacles are.
Example: line them up in 3 or 4 rows Indian file, tell them that in James Bond style they had to collect secret papers but 1st chair they had to step over the barbed wire, then 2nd chair (marker) swim in shark waters and third marker roll under the one foot high laser..... Then do the reverse on way back. Change the obstacles to suit or add variety to the game.