Hair hair hair

When Shelby was little I felt she had so little hair compared to the other girls and couldn't wait until it all came in. She still has hardly any hair and she is 4, it is just so fine and thin. Here is a picture of her at 16 months from the front and back.Now I have Kelsey and I really worry. If Shelby has very little hair for a 4 year old what will Kelsey have at 4. People always comment on how well Kelsey does things, because everyone thinks she is younger than she is. I mean she is small and bald what do I expect! Here are pictures of her at 16 months.