Alright kiddo, have you ever heard of something called Nehushtan? It is actually a Hebrew word that means "thing of copper" or "a bronze item".
This word is pretty important in the Bible because it refers to a snake that God once told a man named Moses to make. You see, the Israelites had been talking bad about God, so God sent poisonous snakes to bite them and make them super sick. When Moses asked God how to fix this, God told him to make a bronze snake and hold it up on a pole. Anyone who looked at the snake would be healed from their snake bites!
So, the Nehushtan is really just that bronze snake that God told Moses to make. For the Israelites, it was a symbol of God's power to heal and protect them. However, over time, some people started to worship the Nehushtan itself as if it was a magical object. This is why, in some later parts of the Bible, it actually becomes a symbol of idolatry (worshipping false gods) and is destroyed.
So, to sum up, Nehushtan is a word that means "a bronze item". In the Bible, it specifically refers to a bronze snake that God told Moses to make as a symbol of healing and protection for the Israelites. However, some people later started worshipping the Nehushtan itself, making it a symbol of idolatry instead.