Rewrite the following sentence to make it more concise:

"The classroom was filled with noisy children making a lot of noise."
"The classroom was filled with noisy children."
Complete the following task based on the instruction and optional input provided.### Instruction:
Rewrite the following sentence to make it more concise:

"The classroom was filled with noisy children making a lot of noise."

### Output:
"The classroom was filled with noisy children."