You could take turns being blind folded and feed each other pre selected things out of fridge. You could make them stick their hands into the bowls and let the imagination run wild about what they "could" be eating and then feed them the item making them belive it is as gross as their imagination belives it is.
also, you could have a volunteer lay on the ground (brother or father) and place plastic over their clothes, put goggles on thier eyes, and place a small dixie cup in thier mouth and take turns trying to ring the cup from the standing position with all the items for a hot fudge sunday!