He is one of the youngest winners in the contest's history, said Marci Greenberg, a spokesperson for U.S. Fund for UNICEF.
Robbie's design of a snowman with a scarf and hat will be used in a UNICEF greeting card that will be sold nationally at Pier 1 Imports and on pier1.com during the 2014 holiday season, she said. The theme of the contest was "Joyous Celebration."
Robbie will receive a $5,000 scholarship and $500 worth of art supplies for his preschool.
Proceeds from the sale of UNICEF cards support UNICEF programs that provide medicine, vaccines, food, primary education, clean water, and emergency relief to help reduce preventable deaths in children under the age of 5.
During a 29-year partnership, Pier 1 Imports has raised about $32 million for the U.S. Fund for UNICEF, Ms. Greenberg said.
"The annual greeting card contest is a creative way to help raise awareness among the youth in America as to what children around the world must face each day just to survive," said Caryl Stern, president of the U.S. Fund for UNICEF.