Made cakes exactly according to Glory's instructions -
1 blue cake, with the center cut out
2- 8" red cakes
1- 8" white cake
She has great directions on her site, check it out there.
I embellished with an exploding firework on top of my creation, but the colors are very bright. Note to self - use LOTS more food coloring next time!
Here is the inside of the cake. Turned out pretty nice! It was a big hit at our 4th of July celebration. Kids liked it.