Many that know me know I've spent a really, really long time doing volunteer youth work in the United Church. Over that time, I've developed a list of games and such for icebreaker situations, many copied from other locations, other people, other resources, etc. Great artists steal, and all that. I wanted to compile it all in one place and make it available, since I have lots of people who ask me for resources, so I'm putting a PDF up here. It's got appropriate games, activities and such for youth groups, school classrooms, and even for adult icebreakers too. We don't spend nearly enough time getting silly as adults – well, I do, but most don't – and I think a lot of people would be in better shape if they got in a daily game of Elves, Wizards & Giants:
Elves, Wizards, Giants
A team version of the old game of `Scissors-Paper-Stone,’ but has funnier actions and noises which each team has to act out. Each character (Elf, Wizard, Giant) has a specific action or noise.
Elf – Squatting down and imitate pointed ears by holding two fingers up by your ears (similar to making bunny ears). Make "Eeeking" noises while doing this.
Giant - Standing on tip toe, arms raised in frightening posture making growling/roaring sounds.
Wizard – Standing normally but with arms outstretched as if casting a spell. Make appropriate spell casting noises.
As with Scissors-Paper-Stone each character/icon can win against one character or loose against the other. In this case if wanted teams can make the appropriate actions for winning or loosing.
Winning team Actions:
Elves shoot Wizards: Elves win
Elves pretend to shoot an arrow, Wizards make dramatic gestures as though struck in the heart.
Wizards frazzle Giants: Wizards win
Giants pretend to shrink.
Giants squash Elves: Giants win
Giants pretend they are squishing something small.
Each team finds a quiet corner and decides on a character to be as a team, after choosing their character each team stands facing each other with hands behind their backs. On a given signal (e.g. the count of three) the whole team acts out their character with the points going to the team that chooses the winning character. If both teams pick the same character there is a draw.

Here's the PDF -- enjoy.