in mixing bowl- combine oats and cereal
In very large microwave safe bowl-
combine sugar, syrup, and peanut butter
microwave on high in 3 minute increments, stirring between each 3 minute time. After the 3rd set of minutes, quickly stir in dry ingredients, getting all incorporated.
Turn onto a greased cookie sheet, patting into a layer about 1/2 inch thick.
Cut while hot, either into squares 2"by 3", or into bite size pieces
Allow to cool.
Place either into airtight container with parchment between layers, or single layers in large Ziplock bag.
These keep indefinitely, or until they are all gone.
They travel well, and may be frozen.