I found this recipe here and thought it would be worth trying out. The instructions say to mix the dry ingredients until a sand texture - I couldn't get that fine with my hand mixer, so mine are a little lumpier.
I couldn't find a fish cookie cutter, but I found a cute little mushroom cutter and turned it into a fish by reshaping the mushroom cap into a tail. I then poke a hole for the eye and used the bottom part of a heart cutter for the mouth.
Mine aren't as nice looking as the recipe photos, but they taste good and Aubrey likes them.
Now she is getting some whole grain, cheese (which she won't eat) and sweet potato!