8 hr 10 min
Combine 2/3 cup sugar and 2/3 cup water in a saucepan and bring to a boil. Remove from the heat and stir to dissolve the sugar; let cool. Combine the simple syrup, 3 cups fresh orange juice, 1 cup Campari and the juice of 1 lemon in a pitcher. Pour the mixture into 16 ice pop molds, add wooden sticks and freeze until firm, at least 8 hours.