How to Make a Prize Iceberg

Fill a large container with water.

Cover it and place in the freezer.

Check it every couple of hours.

Add an assortment of plastic or other waterproof prizes and toys when the water becomes slushy.

Mix the items into the slush so they are distributed evenly.

Wait for the water to freeze completely.

Take the container outside and dump the iceberg onto a table.

Give children plastic or metal spoons and dull knives.

Let them chip away at the ice to get to the prizes.