"Flash"-themed birthday cake and cupcakes

For a 5-year-old's birthday party. I was asked to make a "Flash" cake and matching cupcakes. The cake is chocolate with the classic logo in red and yellow buttercream, while the cupcakes are chocolate or vanilla (not pictured) with yellow buttercream and red sanding sugar or red buttercream with yellow lightning bolt sprinkles. The birthday boy thought they were cool, so that made my day!