Have you ever grabbed a drum and hit it really hard? It makes a huge noise! But do you know what's inside a drum? Nothing. It's empty inside, and that's why it makes so much noise!
The Bible says that whoever is foolish, meaning whoever doesn't have wisdom, is just like that drum: makes a big fuss, shouts, shows off, wants to be noticed by everyone. But inside the little box, there's almost nothing.
The wise child is different: they're like a box full of treasures. They don't need to brag because the good things they have show up on their own, at the right moment. It's just like Jesus in the Bible: when people wanted him to shout, he stayed calm and silent. And that attitude was more powerful than any speech!
The Secret Agent doesn't go around shouting "I'm the secret agent!" to everyone. They act in silence and solve the problem!