Do you only feed fish to your child if filleted? What other fish recipe can we prepare?

You can try incorporating fish into pies and fishes. That way, the fish will be in flakes or small bits and mixed in with other ingredients which will mask the fishy taste if your kids do not particularly enjoy the taste of fish. I personally love salmon quiche and here is a simple recipe you can try: http://www.foodiecrush.com/smoked-salmon-quick-quiche/