Two are very basic and should be done as a quick warm up with no writing. The students see the silhouette, guess what or who it is and rise their hand to try and answer. Then do an answer check. If this is done in groups then give a point to the group for getting a correct answer.
The other gives three hints first and then shows the silhouette. It can be done the same way or every team can have a chance to answer. In that version one member from each group rushes up with an answer and if it is correct they pick a letter and give points for their team. Then do the answer check and move onto the next question with a new team member bringing their answer.