Fragile
Children in white are playing an innocent looking but very dangerous game.
1/4

Solution

The ballon accidentally explodes and fills everything with black oil.

I borrowed the black balloon from Mestizo - thanks for this.

What problem does your idea solve?

showing fragility, danger of accident with big mess as a result.

How does your idea solve the problem?

by shock

Which (communication) means are necessary to turn your idea into a reality?

Ideal for flash banner with the option to turn on audio. There can be made some rich media banner where the oil could spill on the whole screen.

As guerilla action I could imagine a flashmob with activists throwing baloons filled with black paint from buildings or from ground to windows, walls. The paint could be washable (at first step:)