None. Babies don't have the motor skills or the depth perception to change a light bulb.
A: He holds it in the air and the world revolves around him
They had a reptile dysfunction.
Zero, its already lit
Two. One to actually change the bulb, and the other to videotape so Christians can't claim God did it.
Cot-on-wool.
A: They'd read in the newspaper that one out of every five babies born in the world today is Chinese.
He didn't have any depth perception
Depth perception