Don't envy you today. I remember having to make and design a Spider Man cake. Couldn't find a cake mold. Did it all freehand.
Since your going to already have your hands full with kids. Is pre made ahead, frozen out of the question?
A simple bread dough recipe would work for the dough. Rolled out. Cut into stars as suggested already. Take the dough and place it on the back side of a muffin pan. Bake for a few minutes. You could even crimp the sides yourself. When they're cooled fill and freeze them. If one doesn't turn out tell the kids your lucky. You got the shooting star.
All you'll have to do is bake and serve.