Impromptu photoshoot? I uses to do this all the time with my siblings. I'm the oldest of 4 with 14 years between me and the youngest. Doing this today with my 2. 5 year old. Pick a theme, let them pick out their outfit and props then let them take turns being the photographer for their siblings. We always had a blast being in front of and behind the camera (just use your phone) throw on some music to let them dance and bounce around to. My mom swears some of her favorite pics of us come from doing this.