This is a favorite of mine, it is very pretty when cut. It takes a little work but it just may steal the show.
1 small pkg lime jello
1 small pkg lemon jello
1 small pkg cherry jello
Dissolve each in 1 1/2 c hot water, in separate pans, cool completely, when firm cut into 1/2 inch squares.
Crush 24 graham crackers, add 1/2 c sugar and 1/2 c melted butter. Place half of graham mixture into sprayed 9X13 pan.
Dissolve 1 envelope plain gelatin (Knox or store brand, should be in the same place as jello)
in 1/4 c warm water, set aside
Heat 1 c pineapple juice until warmed through, add gelatin, let cool to lukewarm.
While cooling beat 1 pint heavy cream with 1/2 c sugar and 1 tsp vanilla. When soft peaks form, fold in glass(jello cubes), Fold in gelatin mix and pour over crust, top with remaining graham mixture. Chill until set.
You can use ready made cool whip for the heavy cream to save time and calories.