1 cup clementine segments (about 5 medium), seeded if necessary
1/2 cup orange juice
1 cup cubed fresh pineapple
10 plastic or paper cups (3 ounces each) and wooden pop sticks
Place strawberries, 1/2 cup water and 1 tablespoon sugar in a food processor; pulse until combined. Divide among cups. Top cups with foil and insert sticks through foil. Freeze until firm, about 2 hours.
Wipe food processor clean. Add clementines and orange juice; pulse until combined. Spoon over strawberry layer. Freeze, covered, until firm, about 2 hours.
Repeat with pineapple and the remaining water and sugar. Spoon over clementine layer. Freeze, covered, until firm.