This one is an old family favorite!
One box vanilla COOK AND SERVE (important-NOT instant!) pudding
Can chunk pineapple
Any fruits you may want-strawberries, blueberries, grapes, bananas, cocktail cherries, etc.
Cut and wash fresh fruit, mix together.
This is the odd part: drain the pineapple juice into a small saucepan. Add the pineapple to your fruit mixture. Add the pudding mix to the pineapple juice (NO water, just ignore any instructions), keep stirring every so often on medium heat until boiling (be careful not to burn-ick) and turn off. Quickly pour over fruit and mix together. Refrigerate at least an hour or two before serving.