Cardboard & Duct Tape
Duct tape is made of interwoven fibres that imitate real body armour. It is mildly flexible, which allows it to adjust to the shape of the body when put on.

Materials needed: piece of cardboard (± 25x30cm) and 5 to 6 rolls of duct tape.
How to make the body armour: 
1) Cut the top edges of the cardboard to allow arm mobility. 2) Start wrapping the duct tape around all sides of the piece of cardboard until the finished product is ± 5cm thick.

Hardcover Books & Duct Tape

Materials needed: 2 hardcover books (size A5/A4) and 3 to 4 rolls of duct tape
How to make the body armour:
1) Place the two books on a flat surface, placing the spines of the books against each other. The thicker the books are, the more protection they will provide. 2) Tape the two books together. Make sure that the created block is big enough to cover your chest and stomach. 3) Wrap the 3 to 4 rolls of duct tape around all sides of the books. 

Ceramic Tiles
Ceramics are known to be some of the hardest materials and are used as inserts in soft ballistic vests. It is hard enough to ensure that a bullet or other weapon is deflected.

Materials needed: ceramic tile, metal mending plates, silicone glue, newspapers/magazines, duct tape.
How to make the body armour: 
1) Layer the newspapers/magazines on a flat surface. They will be used to hold the armour and fit it to your body. 2) Spread one layer of silicone glue on the newspapers/magazines. 3) Place the metal plates on the newspapers/magazines. Allow for a few inches of space between the metal plates and the edges of the newspapers as those edges will be wrapped around the side of your body. 4) Spread another layer of silicone glue over the metal plates.
5) Place the ceramic tiles over the metal plates and silicone glue. Allow it to dry completely. 6) Wrap the whole finished product with duct tape.

In addition to either body armour equivalents, it is urged to wear some sort of head protection as well, such as a bicycle or motorcycle helmet.