Re-write the following sentence to make its meaning more precise.
The girl jumps on the bed.
The young female is bouncing up and down on the mattress.
Complete the following task based on the instruction and optional input provided.### Instruction:
Re-write the following sentence to make its meaning more precise.

### Input:
The girl jumps on the bed.

### Output:
The young female is bouncing up and down on the mattress.