Daniel- Have a water gun fight, you guys enjoy acting like kids together and what better way to do that then having a water fight.
Luke- Sit around a campfire and have Luke sing songs with his guitar, it's nice to relax in eachothers company.
Beau- you guys like to sit and watch films together, while eating a load of junk food and laughing at eachothers stupid quirks.
Jai- you guys like to explore together, you find new places to wander around together and you'll always stop for a picnic.