Jugglers

Juggling can refer to all forms of artful or skillful object manipulation. This includes most prop-based circus skills such as diabolo, devil sticks, poi, cigar box manipulation, fire-dancing, contact juggling, and hat manipulation.

Jugglers often refer to the objects they juggle as props, the most popular being specially made balls, beanbags, rings, clubs, or bouncing balls. Some performers also use "dangerous" objects such as chainsaws, knives and fire torches.
Source: http://en.wikipedia.org