Lots of Ice Breakers found at:
http://www.reunionsmag.com/reunionarticles/family_ice_breakers.html

Read them all, but here are a few from that site:

"Try a balloon race. Mark start and finish lines. Start each race with a signal.
First race - Carry the balloon on a plate.
Second race - Kick the balloon.
Third race - Hold a balloon between your legs."

"Ask everyone to stand in a circle facing in. Tell members each person is to say his/her name and pantomime a favorite activity or hobby. "My name is Patty." Everyone says, "Hello Patty." Then she acts out her hobby; piano playing, cooking, biking, golf. Everyone guesses until they guess Patty’s hobby, when her turn is over. When the game is finished, everyone's name and a hobby are known."

"Make a word-find puzzle using all the cousins’ names."

"Ask everyone to stand in a circle facing in. Tell members each person is to say his/her name and pantomime a favorite activity or hobby. "My name is Patty." Everyone says, "Hello Patty." Then she acts out her hobby; piano playing, cooking, biking, golf. Everyone guesses until they guess Patty’s hobby, when her turn is over. When the game is finished, everyone's name and a hobby are known."

Georgia Walker-Adams