If your carved pumpkin shriveled up, try this method I got from Wiki.
- Fill a deep sink full of cool water.
- Remove the candle and any other accessories from your carved pumpkin.
- Place your pumpkin totally in the water, making sure that the carved parts are all under the water.
- Let your pumpkin soak for a couple of hours.
- Enjoy your no-longer-shriveled pumpkin!