Cake / Barrage from Brothers Pyrotechnics called Ninja. Cake / Barrage from Brothers Pyrotechnics called Ninja. There are 3 cakes in the Ninja range. Each cake is sold separately. All 3 are shown on the video link. Each ninja cake has 19 shots and last circa 30 seconds and full of different effects, such as colours, crackles and tails. Contact the Edinburgh Fireworks Store team if you have any questions on Ninja by Brothers Pyrotechnics.