This is a new-style, 500 gm cake by the company Subtle Fireworks. They have the same effects of huge colorful breaks (explosions) when they soar into the air, but the breaks are much quieter (more subtle) than your normal loud 500 gm cakes. Beautiful colors and effects are not skimped on either. If you live near firework party-poopers, this may be a nice compromise.
Remember to always monitor your child's activity around fireworks.