Line the bottom of a trifle dish or bowl with ladyfingers.

Prepare the strawberry jello according to package directions in a separate bowl.

Pour the prepared jello over the ladyfingers, ensuring they are evenly covered.

Arrange sliced peaches over the jello layer.

Refrigerate the dish to allow the jello to set completely.

Prepare the vanilla instant pudding according to package directions.

Once the jello has set, gently pour the prepared pudding over the peach layer.

Refrigerate again to allow the pudding to set.

Spread a generous layer of Cool Whip over the set pudding.

Refrigerate until ready to serve, ensuring all layers are chilled.