Concept: A dot (as an individual element) represents a person (a donnor, admisitrator, etc). These dots get together to shape a form, just like UNICEF unites people to achieve a common goal: help the children.
The different colors stand for diferent races, sizes, origins, all together.
The concept can be adapted acording to different regions in the world:
Piñata: making reference to Latin America
Xmas tree: making reference to every society that place a christmass tree
Fireworks: celebration of new year