For Jello: Make the three kinds of jello, dissolving each in 1 and 1/2 cups hot water. Set into separate square or cake pans, for thin layer of jello and chill until firm, or overnight.
For Crust: Crush graham crackers. Mix with butter and sugar. Line a spring-form pan or pie dish with mixture. Set aside some of the crumb mixture, this will later be used as a topping. Place the graham crumb base in the fridge so that it starts to harden.
For Filling: Soften unflavored gelatin in cold water; dissolve in hot pineapple juice. Whip cream, adding sugar and vanilla when almost whipped, while pineapple-gelatin mixture is cooling. When cool, fold into whipped cream.
Cut flavored jello into small 1/2 inch cubes; fold into filling. Pour into pan over crust and sprinkle with remaining crust mixture. Chill six to eight hours or overnight.