I love the game Who Am I for a party - it's casual and non intrusive.
When guests arrive, put a the name of a famous baby on their back on masking tape. They should not be able to see which name is written on the tape. If they choose to play, they can guess who they are by only asking yes or no questions to the other guests. Once they guess successfully they can move their tape to the front. It's a great ice breaker when bringing lots of different people together - gets people mingling.
If you have any additions to the list below please do post them!
Famous Babies:
Muppet BabiesRoo from Winnie the Pooh
Baby Bear from Goldilocks
One of the 101 Dalmation puppies
Bambi
Trixie from Hi & Lois
Baby Smurf
The Fox and the Hound
Rosemary's Baby
Hugs and Tugs from the Carebears
Thumbelina
1996 Internet Dancing Baby
Ike from TV Show South Park
Baby in the Fairy Tale Rumplestiltskin
Babe the pig in the Movie Babe
Babe Ruth
Gerber Baby
Sweet Pea from Popeye
Baby Jesus
Baby Brent from Cloudy with a chance of Meatballs
Shirley Temple
Spawn of Octomom
Olsen Twins
Louise Brown, first test tube baby 1978
Stewie from Family Guy
Suri Tom Cruise's Baby
Maggie Simpson
Shiloh (Brad and Angelina)
Apple (Gwenyth Paltrow)
Knox & Vivienne (Brad and Angelina)
Maddox (Brad and Angelina)
Coppertone Baby (Jodie Foster)
Baby Shrek
Pebbles
Bam bam
The baby at the end of 2001 a Space Odyssey
Limberg Baby
Dionn Quintuplets
Baby Moses
Baby who survived the Frank Slide
Baby from the Munstsers
Baby from the movie Labrynth
"Avery Brown" Murphy Brown's Baby