Maggie Simpson's full name is Margaret Simpson. She is 1 year old, and according to the local grocery store, costs $847.63. Her first spoken word was "Daddy."

For being only 1 year old, Maggie Simpson has lived a full life. She shot Mr. Burns. She won a Cutest Baby contest. And she already has a nemesis -- Gerald, the baby with one eyebrow.

Substitute Pacifiers
Maggie is seen usually sucking on a pacifier. But when she's had to, she has found comfort sucking on other items:

Fried shrimp.
Krusty pacifier.
Bart's severed finger.
Flash card.
Chess piece.
Seatbelt.
Bart doll.
Herb's nose.
A cigarette.
A dreidel.
A giant tooth.
Diamond-studded pacifier.
Drink umbrella.
Christmas cookie.

Passing on the Pacifier
Maggie is generous with her pacifier, as well.
She has given it to other folks to suck on.
Bart
Lisa
A bear
Homer
Lisa's pony
A snake
Mr. Burns

Maggie Shows Her Smarts
It's also possible that Maggie is a genius disguised in baby form. In some episodes, it is obvious she is more intelligent than she seems:

Knows what a VCR remote is used for.
Spelled out "E=MC sq" with toy blocks.
Communicated with bears.
Shows Lisa an "Aztec" flashcard after seeing the Olmec head.
Drove Homer's car.
Spelled "redrum" on blocks.
Saved Bart and Lisa from Willie.
Used fire extinguisher to put out curtains.