Jumping crackers or Jumping jacks are a type of firecracker. When lit each segment loudly pops (or bangs, depending on how much paper is used) and has a nasty habit to unpredictably jump around, (hence the name) changing direction with each bang.
They were a common firework available in assortments in the 1930's from such companies as Brocks. They were subsequently banned for their unpredictable nature.
You will need some kraft paper around 30-50 lbs in thickness.
|- | valign="top"|Click for larger imageA jumping cracker is made of a craft paper strip roughly 6 cm by 25cm. It is also possible to use a longer strip, this will result in more cracks (or "jumps"). First a line of wet meal powder is applied with a small paint brush along the longer edge of the strip of kraft paper, which is then wound several times and glued. |- | valign="top"|Click for larger imageIt looks much like quick match tube. One end is then bent, thus making an end chamber. |- | valign="top"|Click for larger imageThe tube is now zig-zagged as many times as the length allows and a piece of fuse stuck into the opposite open end. |- | valign="top"|Click for larger imageA piece of twine or string is then tightly wound around the center and criss-crossed around each segment of the snake-looking device. It is then left to dry for a day or more.
When lit, each segment loudly pops (or bangs, depending on how much paper is used) and has a nasty habit to unpredictably jump around (hence the name) changing direction with each bang. |}