Split the group into random teams and have them line up so they are all facing forward, one behind the other. You will show the person at back of each line an image, they will then draw that image on the back of person in front of them and so on down the line until the last person draws it on their sheet. Team with a resulting image that most closely matches the original wins. Drawing only on people's backs, no letters or numbers, and no talking!

You can play multiple rounds but rotate the positions of the players in the lines.

Scoring is, as always, completely arbitrary, you can award only the winning team or award points on a sliding scale from best to worst. Decide how you wish based on the number of players.

You can easily change the difficulty here based on the images you show the first person, you should have very basic line drawings, but can get more complicated based on the group.

You can use words instead of images for the person at the back of the line, but then judging is a bit different.