The three things are
paper
plastic
water
Many items are made with recycled materials. Most of the paper products and cardboard contain at least a portion of recycled material. Plastic items can also contain recycled content and are usually marked.
Paper
Yes, paper can be made of many different fibers, wood, cotton, hemp, cloth, and recycled paper. So paper made from hemp can be recycled.
Most of newsprint, writing, printing and or packaging papers can be made with recycled paper.
That is the correct spelling of "recycled paper" (paper that is made at least partly from old paper).
Recycled toilet paper is made from used paper. It isn't made from used toilet paper. That would be gross.
New paper! If you see a paper advertised as 100% post consumers recycled paper, you know it has been made from paper others have recycled. There are also toilet papers, wrapping papers, paper towels, books, coffee cups, newspapers, magazines, tissues, and other things that are now made using recycled paper.
Recycled toilet paper
Cardboard is made mainly of wood, but it can also be made from recycled paper.
Yes, books are made from paper, and paper can be recycled, including the soft and hard covers.
Recycled toilet paper
it gets made into paper again!