The Army Museum of Singapore mixes a history lesson with technology in their current Facebook application contest called Mission: Lost In Time.
Upon registering and entering the app, you find yourself in a curious scene with the old Singaporean army. The app calls users to simply guess the number of objects which don’t belong to the time when the photo was taken. Those who give the correct answer will get a chance to win great prizes.
The contest ends on the 22nd of this month so if you’re interested in joining, better head on to the Army Museum of Singapore’s fan page now.