I wouldn't make it this way... too time consuming and does not go in a lunchbox. Kids who are fed darker nutritional breads come to love them quickly... no need to entice.
We have a sandwich we call our "tic tac toe" sandwich... two open pieces of bread; on one slice, put peanut butter on the bottom half horizontally and on the top, cream cheese. On the other slice, put vertically grape jelly and strawberry jelly side by side. cut into four squares and you have a peanut butter/grape sandwich, a peanut butter/strawberry sandwich, a cream cheese/grape sandwich and a cream cheese/strawberry jelly sandwich. Fun, easy, and easy in the lunchbox.