This classic vanilla buttercream cake is perfect for a kids' birthday party. The cake is moist and fluffy, and the buttercream frosting is rich and creamy. To make the cake, you'll need flour, sugar, butter, eggs, milk, and vanilla extract. Mix the ingredients together, pour the batter into a greased cake pan, and bake in the oven until golden brown. Once the cake has cooled, frost it with the buttercream frosting. Decorate with colorful sprinkles or edible cake toppers for a fun and festive touch.