alot of girls walk at a very early age! and alot of boys usually take longer, at most everything*
Z looks small and very much like a baby for a 19 mo old. we have no idea if she has any health issues which the media has alluded to several times. she was malnourished really for the first vital months of her life. another point is that she is carried a lot. maddox was too and he still is carried way too much for his age and size. there was a picture of a slightly pregnant angie carrying both, one in each arm. lara croft or not, she's a small gal and she's screwing up her back. the 4 yo definitely needs to be on his feet.
the worst is kelly ripa. her kids are HUGE (not fat, but definitely way taller and bigger than the kids of their age group). she carries her 4 yo daughter (lola?) and it looks like lola is about 30 lbs away from kelly's weight. i don't know how those kids are so big. she's tiny and her husband is average sized.
laura ashley, kids aren't malnourished or under developed because they come from africa. other than north america, japan and western europe, pretty much every other part of the world has some issue with proper nutrition for children. that is why it is a leading cause of death in children. i was born in the same exact country she was born in and i was far from malnourished.
Zahara had some health issues when she was adopted, she spent a lot of time in the hospital with salmonella poisoning. She only weighed 9 pounds and 6 months old. It will take her a while to catch up. Preemie babies are the same way, they tend to calculate their "real" age from when they should have been born. By the same logic, she's more than 6 months younger than she actually is.
But, all kids are different. She seems like a happy healthy kid in all other ways.
my sis was sick since birth, give her a break people! mommy is doing her best
every baby develops differently...some walk quicker..some don't..some talk sooner..some don't...you should never compare a child with another child..

Yeah, it's been too long for that girl.
My 3 year old didn't end up walking until about 13 to 14 months, and he's even a little delayed with his speech (in preschool to fix that right now...Yay for me!) I think that's a part of the problem for these celebrity babies...getting tugged and taken everywhere and never having a chance to "grow up", y'know? And how old is Sean Preston? Hmm...