Frog's Eye Salad

1 cup Acini De Pepe
2 cups mandarin oranges
1 cup pineapple tidbits
1 1/2 cups marshmallows
3 egg yolks
3 Tbsp. flour
1 cup sugar
1 reg. size Cool Whip

Boil Acini De Pepe in salted water till tender, but not soft (about 10 minutes) and drain. Drain fruit. Thicken fruit juice, egg yolks, flour and sugar. Add drained Acini De Pepe while dressing is still hot, then let the whole mixture cool. When cooled, fold in marshmallows, fruit, and Cool Whip. Chill