Devil stick

The manipulation of the devil stick (also devil-sticks, devilsticks, flower sticks, gravity sticks, or juggling sticks) is a form of gyroscopic juggling or equilibristics, consisting of manipulating one stick ("baton") between one or two other sticks held one in each hand. The baton is lifted, struck, or stroked by the two control sticks ('handsticks' or 'sidesticks'), stabilising the baton through gyroscopic motion.

Devil sticks are believed to have originated in China in the distant past, in the form of simple wooden juggling sticks. They are one of the circus arts, and is sometimes called devil-sticking, twirling, sticking, or stick juggling.

Devil and Flowersticks are variable in size (30–80 cm (12–31 in)) and weight (100–250 g (3.5–8.8 oz)).

Devil sticks are often conic and most of the times wooden.

Flower sticks have flower-shaped ends which somewhat slow down the movement of the baton to learn more difficult moves and tricks. Heavier and floppier ends allow for greater control by expanding the with more weight and increasing the duration of the control phase of a stroke or lift due to the momentum and continued motion of the 'flop' or 'tassel' on the ends of the central baton.

Fire devil sticks (also known as firesticks) typically have an aluminum core and have fuel-soaked wicks on the ends to allow them to be set on fire for visual effect. Both flower and non-flower versions of firesticks exist.

Illuminated devilsticks can create interesting visual effects in darkness with the use of battery-powered electric 'seed' bulbs; LEDs; or with phosphorescent or chemiluminescent materials.

Fire devil sticks. The photographer has used a long exposure time to capture the trails of motion.

A devil stick (right), flower stick (middle, with rubber flares to slow it down), and two smaller control sticks (left).

2 devilsticks and a set of handsticks

...
Wikipedia