Taste some green (unripe) fruit, then wait until it’s ripe and try it again.
Discussion point: Many rewards are more fulfilling if we wait for them.
Buy some green fruit. Have your children taste them when they are green, then wait a few days and taste them when they have ripened. Explain that life is like waiting for fruit to ripen. Sometimes when we are impatient for things and demand them right away, the end result will be that they will not be seem as good as if we had waited.
Give examples that are applicable to your children's lives, like a birthday cake. When a pretty cake is decorated for a birthday party, it is hard to wait until the guests arrive to eat some, but it would be very disappointing to serve friends a birthday cake with a chunk taken out of it.