Trick-or-Treat for UNICEF is a fund-raising program for children sponsored by the U.S. Fund for UNICEF. Started on Halloween 1950 as a local event in Philadelphia, Pennsylvania, United States, the program historically involves the distribution of small orange boxes by schools to trick-or-treaters, in which they can solicit small change donations from the houses they visit. Millions of children in the United States, Canada, Ireland, Mexico, and Hong Kong participate in Halloween-related fund-raising events for Trick-or-Treat for UNICEF, and the program has raised over US $188 million worldwide.