Put up a large poster/draw a picture on the white/blackboard. Cover the picture with pieces of paper labeled with numbers (1, 2, 3, etc…). It is best to do this with 3 rows of 3 (9 pieces of paper covering the picture/poster). Students (in teams) call out a number and have to answer a question (this can help them produce language being studied, or be about language being studied). If they answer correctly, the teacher will uncover that part of the picture. The team that guesses what the picture is first, will win! This can also be done by covering up a letters in a new vocabulary word or sentence that focuses on a new grammar point.
image is taken from: nitrome.com