When Abimelech killed his brothers; he missed one, Jotham. After Jotham discovered what Abimelech had done, he went to a high place where the people of Shechem could hear him and told the following tale:
The trees decided to choose a king. First they went to the olive tree. The olive tree replied that it didn’t want to give up making oil. So the trees went to the fig tree. The fig tree responded that it didn’t want to become king because it wanted to keep making its sweet fruit. Then the trees went to the grape vine to be their king. But the grape vine wanted to keep making grapes. So the trees invited the bramble (or thorn bush) to be their king. He readily agreed and offered his shade for their protection. The bramble then warned that anyone who didn’t follow would be burned, even the mightiest trees of all, the cedars of Lebanon.
But what did Jotham mean? His father (Gideon) and good brothers had been like the olive, fig and vine. They did their jobs that served their people and were content. But his brother Abimelech was like the bramble. He really didn’t have an exciting purpose so he was glad to be more than he deserved. He made promises he probably couldn’t keep (a thorn bush can’t really give shade). And he would probably turn on them in the end. Jotham was warning the men of Shechem that they had made bad choices and it would come back to hurt them eventually.
We need to be content like Gideon and most of his sons and follow the path God has for us. (That could be leadership or not.) Abimelech was greedy and wanted his own way and he paid for it in the end.
Look up pictures of olive trees, fig trees, grape vines and brambles. Talk about how each has a purpose. Talk about the good things the bramble does (shelter for animals, etc.) and how we should find the great in our lives and focus on that and not get greedy for more!