What is he wondering about? Perhaps about a tiny little thing like a balloon? To understand this, one has to know, that the clown is stuck in a situation, where every little thing becomes a big problem.
The thing is, that instead of the director, who is unavailable today, it's him who has to perform! For children!
Okay then, he's having a go at it. But no! No matter how much he tries, the challenges already start with the simple things and - of course - don't stop when it becomes special and complicated. If a walking stick already makes a lot of trouble, what can you expect from a magic wand?! And then there are brooms, telephones, juggling balls and real fire. Thats why it's even more remarkable that some things are actually working in the end.

But nothing would work without the children.

They instruct, protest, correct and laugh at him, and solve his difficulties.
That's why in the end, the whole thing eventually turns into a clown spectacle.