Four young girls for whom I babysit, Mackenzie, Maggie, Meredith, and Morgan, are sisters of different ages and developmental levels. Mackenzie is eight years old, Maggie is six years old, Meredith is three years old and Morgan is sixteen months old. Each girl is at a different stage of cognitive, physical, mental, social and emotional development. I have been babysitting the girls for four years now and have been able to see them grow and change in many different ways. Since they come from the same family, I was also able to see how nature and nurture played a role in their development. Children of different ages will be at different stages of development, and the four Weaver girls show the different stages of development. Her older sister, Mackenzie, is a very active, playful, intelligent and talkative little girl. Mackenzie appears to be tall for an eight-year-old, with long legs and a seemingly proportionate body. He has a much more mature face, less chubby and is more defined. He has lost several baby teeth and his adult teeth have grown in. His physical development is on target and continues to develop. Mackenzie's cognitive abilities are really good. Her mother homeschools her two older children, and Mackenzie retains most of the information she is taught. There were numerous times when Mackenzie was able to teach me something new because she could remember the lesson her mother taught. He also has a great vocabulary and can have very intelligent conversations. Mackenzie structures her sentences very well and understands some aspects of grammar. He has amazing social skills and can get along with almost anyone. This child's display of empathy is fantastic. He is aware of what others feel, his desires... half of the paper... will continue to increase as he gets older. Meredith's cognitive development is not as advanced as that of her two older sisters. Sometimes Meredith may tell me a story about something that happened, but most of the time she talks about things she likes. Meredith's vocabulary consists of very simple words and she can form simple sentences. Meredith has a pretty decent memory and loves telling people the things her mother tries to teach her. Meredith has adequate social and emotional development. She is very shy and doesn't talk to many strangers. She is slowly adjusting to allowing strangers to comfort her and not always her mother. He is starting to express his feelings and understand the feelings of others. Meredith still doesn't have a great sense of empathy. He has a lot of temper tantrums if things don't go his way.