My kids would like the banana and peanut butter of a banana and PB sandwich,but mommy always has a solutions.I just wish I had more imagination and make those really cool kid dishes.Maybe that's something I should look into one of these days.
You could do lots of variations on this recipe, try mini M&M's, coconut, raisins, dried cranberries, ect.Found this on thatsmyhome.com

Ingredients:
1 banana, sliced
1/2 cup Rice Krispies or 1/2 cup corn flakes
1 -2 tablespoon peanut butter

Microwave peanut butter till semi-liquidy.
Dip banana slices in the peanut butter and coat with cereal.
 Refrigerate until peanut butter has thickened.