my kid are all about the same age as yours and they all work. too. perhaps trying landscape photography? or some city or town shots like architecture? when one of your kids is free you can also do portrait shoots of them. I love taking pics around town. I like to hit the sites that many sightseers go to and snap photos. I try to get out of my comfort zone when I shoot. even though I don't have a DSLR yet, my cell phone takes some really snazzy pics which I edit afterwards with photo apps on my phone. hope you can eventually add more photos to your flickr account!