When shooting with children, it's especially important to allow enough time. This way, the little ones in particular have time to see what the black thing actually is and why the thing behind it is always making fun of them :) I worked in a daycare center and then continued to look after a child of that age. During that time, I was able to learn a few tips that result in really sweet pictures. There are always influences that you can't control, like a bad nap. You can never completely avoid that. That's why I adjust the time to your needs as much as possible to make it relaxed for you and the kids. I always give my clients a checklist with outfit tips and other essentials.