Second and third try with Studio Light...

You are very lucky to have really cute children to photograph.

I would just like to comment on the first two images. First, I really like these shots. I think the first image could be a little better by either having her turn so her legs are not pointed directly at the camera as this makes them look too large. I would either turn them 45 degrees to the camera, or shoot with a much longer lens which will compress the image somewhat.

I would recommend toning down the brightness of her feet on the second image. They tend to draw attention to her feet because they are so bright. You could do this with your lighting, or do it in post processing.

I look forward to seeing more of your shots.

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Lawrence