sprinkle on the yellow and red sprinkles to look like hot embers from a grill
use black writing icing to apply grill slates across the cupcake
get creative with adding candy "meats" to the cupcakes. The black food coloring is used on a toothpick and you will want to drag it across some of the caramel candies to create a "charbroil" effect. You can shape the caramels by cutting and rolling them.
To do the kabobs, just take a toothpick and cut the candy fruits in half and place on toothpick.