Mostly kids eat them so why not make them healthier.

Use only a hint of a preserve/jam of your choice or not.
On top of the peanut butter side place fresh blueberries next to each other. The texture and moist goosh of blue berry is great.
Milk is not mandatory anymore.

Or sliced necterines or manderine oranges or the ol standbye bananas or thinly sliced carrots.
Just don't try to sneak in broccoli.

Whats your perversion version?