Two Greedy Bear Cubs

How to explain to a child that greed is bad, very bad? You need to read them a fairy tale about how two nice bear cubs — one younger, the other older — found a piece of cheese by a... forest path, but could not enjoy it because each thought that the other had a bigger piece. A cunning fox took advantage of this and gobbled up the cheese. So, who do you think should have given in: the older or the younger bear cub?
The fairy tale was illustrated by the famous children's artist Evgeny Rachev. These illustrations were first published in 1952.