It is actually using a hollow cylinder of acrylic as the fuel, with gaseous oxygen as an oxidizer. We’re already quite familiar with solid rocket propellant, but this hybrid approach is much ...
Here’s a design that lets you make acrylic enclosures without using fasteners ... which has been removed to form the clip. This uses the rigidity/flexibility of the material to form a spring ...
Acrylic paint, known for its versatility ... while the tape-bound pad makes it easy to use. The paper is also acid-free, which means it is durable and can last for a long time.