IT should be noted that all the data here is purely from research.  As I am allergic to this herb, I have not been able to experiment with it.

Most of my sources lavender will assist in fighting insomnia.  Classically, it has been used inside sachet pillows that you place in or near the one you use, and the aroma helps to bring sleep and to deepen it.

I do suggest care in using this herb on a large scale with children.  Lavender has been shown to mimic estrogen, and there is evidence that it can provoke early maturation in girls and increase the femininity of boys.  Stay away from toiletry products for children and babies that utilize this as a scent or calming agent.  There are other options without the potential hormonal issues.

Mint Family.