Pengcast, I like the recipe for do-it-yourself power bars in Heidi Swanson's Super Natural Cooking. It does call for nuts, but you can just replace the nuts with more dried fruit and oats. I made these once when I didn't have enough walnuts, so I just added more cranberries and oats (I do love oats) and crispy rice cerial. Here's the recipe--it's pretty basic and amenable to variations:
1 Tbsp butter
1-1/4 cups rolled oats
1-1/4 cups chopped toasted walnuts
**substitute a mixture of oats, cereal, and dried fruit, like chopped dates or raisins or even mini chocolate chips, whatever you like
1/2 cup oat bran
1-1/2 cups unsweetened CRISP brown rice cereal
1 cup chopped dried cranberries (note: I never bother to chop these--too lazy!)
3 Tbsp finely chopped crystallized ginger
1 cup brown rice syrup
1/4 cup sugar
1 tsp vanilla extract
1/2 tsp fine sea salt
Grease an 8X8 or 9X9 baking pan with the butter. Mix oats, whatever you've subbed for the walnuts, cereal, cranberries and chopped ginger together in a big bowl. In a saucepan, add the rice syrup, sugar, vanilla, and salt. Bring to a boil over medium heat, stirring constantly. When it thickens slightly (about 5 min.), remove from heat and pour over oat mixture. Stir until the syrup mixture is mixed throughout the cereal mixture. Spread into your baking pan (use your hands--they will get sticky!). Cool. Cut into whatever size is appropriate for you.
Edit: Make sure that you sub both oats AND cereal (and whatever other stuff) for the walnuts, because too many oats will probably cause this to become to heavy textured. Also, you could probably drizzle the tops with icing, which might appeal to your child.