Whiteboard or sheets of paper
Pens
Timer
This one is for teams
Inside works best
This game is played in a number of rounds where all teams are trying to draw and guess the same thing. Teams will designate a first drawer and you will show the drawers from all teams at the same time something they will have to drawer, their teammates will have to guess what it is. The catch is the drawer can only draw three straight lines at a time. The drawers will have ten seconds to draw 3 straight lines. Their teammates will then write down their guess of what is being drawn and pass them to the game master. A correct guess will win the points. If both teams are incorrect the drawers will get 10 more seconds to add 3 more straight lines to their drawing, then a further round of guessing. This will continue until it is guessed correctly by one or more teams. The resulting image must be a drawing, players cannot spell out word, etc. You can decide how strict to be but I tend to go with: Something other than straight lines – eliminated; More than 3 lines at a time – eliminated; Talking from drawer – eliminated.
Scoring is, as always, completely arbitrary, as many points to the winning team members as you like, perhaps less points if there is a tie. Decide how you wish based on the number of players.
You'll want to pick the objects being drawn based on the players, but as a general rule, round things are funnier.
Some examples of objects I have used in games: airplane, mug, book, cloud, tree, clock, dog, windmill, car, ball