Stapler.

A sponge.

Each was the name of 1 child.

A towel

3020
The first 2 digits on the right of the brackets are divided by the digit on the left to gve the first digit inside the brackets. The remaining number on the right of the brackets is multiplied by the digit on the left of the brackets to give the remaining number inside the brackets.

A library.

Piece of paper.

The world.

Racecar.

E, the first letter.

How much is half a hole? Since there is no mention of how big the holes are you cannot complete the riddle with a correct answer.

Longgan