Physical- Horsey back ride. Carry a teammate to the pond checkpoint or the next trail intersection on your back or however you choose. Feel free to switch as needed. 

Mental- Using as much evidence as possible, guess the date of the last time the barn was used and what it was used for. OR Make up a story about the barn as a team. The youngest person starts by creating the first sentence, then, continue to the next youngest person. Each person adds one sentence to the story until the team decides it is complete.