Preheat oven to 350° F.
Mix flour, cinnamon and sugar. Add butter and blend until the mixture is crumbly. Add oats and nuts.
Take 1/4 of the mixture and mix with the blueberries.
Place blueberries in buttered baking dish. Top with crumble mixture.
Bake at 350° for about 40 minutes.
Blueberry Crisp can be eaten hot or cold. Enjoy!