Mosaic Cloud Cake
["3 (3 oz.) pkg. Jell-O", "4 1/2 c. boiling water", "1 pkg. plain gelatin", "1 1/4 c. boiling water", "1 1/2 c. graham cracker crumbs", "1/2 c. sugar", "1/2 c. butter, melted", "2 c. heavy cream"]
["Separately dissolve 3 different flavors of Jell-O each in 1 1/2 cups boiling water.", "Pour each in individual 8-inch square pans.", "Chill until firm.", "Cut into 1/2-inch cubes.", "Toss together. Dissolve plain gelatin in 1 1/4 cups boiling water.", "Chill until syrupy.", "Meanwhile, combine graham cracker crumbs, 1/4 cup sugar and butter.", "Press mixture on bottom and sides of spring-form pan. Chill.", "Whip heavy cream with 1/4 cup sugar until of mounding consistency.", "Fold in gelatin mixture.", "Fold in Jell-O cubes. Pour into pan.", "Chill 4 hours or overnight."]
["Jell-O", "boiling water", "gelatin", "boiling water", "graham cracker crumbs", "sugar", "butter", "heavy cream"]