Preheat oven to 350. In small bowl, combine flour, baking soda and salt; set aside. In large mixer bowl, beat butter and sugar until creamy. Beat in eggs and vanilla. Gradually beat in flour mixture. Stir in rainbow chips. Drop by rounded measuring tablespoonfuls onto ungreased cookie sheets. Bake 11 t dozen minutes until edges are lightly browned. Let stand 2 minutes. Remove from cookie sheets; cool. Makes about 3 dozen.