Follow The Leader
For this ice breaker, put people into A and B groups. Have As partner with Bs they have not met before. Instruct the A group to go outside, then blindfold them. Tell the B group that they are to lead the As back to their seats, but they can only use verbal instructions. After the As have made it to their seats, reverse roles so the As must lead the Bs to their seats.
Line Up
Blindfold everyone in the group. Then tell them to line up according to their birthday, but they must do this silently. This will not only require organizational skills from the leader but also from the people involved. If this proves to be too hard, let them discuss communication strategies before lining up.
Problem Solving
Give everyone a note card and a pen and have them sit in a circle. If there are too many people, then break them into smaller groups. Have them write down one problem. (You choose the context of the problem choices like office problems, camp problems, environmental problems, etc.) Then have everyone pass the card to the person on their left. That person will read the problem and write down a solution. Repeat this process until everyone gets their own cards back.
Learning Names
Have everyone stand in a circle and say their name. Then give someone a ball. The person with the ball must say her name and the name of the person that she is throwing the ball to. The person who catches it must repeat this process.
Card Game
Write notable people on one side of an index card (one person per card). Then tape a card to each person's forehead. Do not let a person see the name that is on his head. Have them walk around and ask people questions that will help identify who is on their foreheads without saying names.