The key organic ingredients here are the oats, bananas and any dried fruit you choose to add. Conventional oats are often treated with glyphosate as a pre-harvest drying spray, so organic oats avoid this and help reduce pesticide residues in a food children might eat frequently.
Bananas and dried fruit can also be treated with post-harvest fungicides and preservatives. Choosing organic versions cuts down on these inputs and means the natural sweetness in the bars comes from fruit rather than additives.