Line a bake sheet with wax paper and preheat oven to 200 degrees. Lay out some waffle pretzels (remove broken ones!) and place a white wafer on top of each waffle pretzel. (This is something little hands can help you with!!) Place the baking sheet in the oven and bake for only 5 minutes. Watch them close. You don't want them to burn. Quickly you will need to place a green m&m on top of each pretzel. Let cool in the fridge for 5 minutes to set.