For the "sand"
Preheat oven to 350 degree
Place the coconut onto a baking sheet lined with parchment paper and spread it out so it is in an even layer
Place in the oven for 5-10 minutes or until lightly toasted, and the color of sand you are looking for
Allow to cool
Place the graham crackers and the cooled toasted coconut into a food processor and process until it if finley ground and looks like sand!