Ice cupcake with white icing, then dip into brown sugar or graham-cracker crumbs to coat. Mould pieces of crispy rice treats into one square and four turrets. Coat with brown sugar or graham crumbs. Wrap a piece of crispy rice treat around the middle of a pretzel stick. Poke pretzel into square, then into centre of cupcake. Press turrets into icing on each corner. Cut red fruit leather into a flag. Use a dab of icing to attach to top of pretzel stick. Sprinkle chopped chocolate rocks around edges.