beetroot
No, a 5p coin is not magnetic. The material used to make UK coins, including the 5p coin, is not attracted to magnets.
Wood was used to make the first submarine
cow poo
the first planes were made of wood and canvas.
feathers
The metal disc used to make a coin is called a "coin blank" or, more formally, a "planchet." They also used to be called "flans," but that term is no longer as widely used.
Since copy coins don't have any standards, anyone can make a copy coin out of any material (lead, zinc, gold, silver, copper, etc.) only a coin dealer or jeweler who sees your coin in person can guess at what it is made out of. It has no collector value, the only value comes from the metals used to make it. Most are just gold-plated copper and have no value though.
Coins can be made out of various materials such as copper, nickel, zinc, and aluminum. The specific material used depends on the country issuing the coin and its denomination.
Velour material is material used to make tracksuits etc.
Lincoln Penny
Beach scarves make good towels, but check the material first to make sure it can handle the water.