Phosphorus babies have often reddish hair, are tall and slender, have skin and lung problems if any. do not complain much, are independent, sunny characters. Like to play and everyone's darling. They learn fast to exploit this and when a bit older tend to be somewhat unreliable - the nature is too playful. I would say that when it is a baby I would first look at Calc.phos. as the stage of growth needs Calc. first. Calc is structure, one of the most important things for a baby.
Short attention span, mile wide, inch deep. can entertain itself for hours, but thrives on an audience.