This model of the Chinese hacky sack has a leather sole filled with sand and sawdust like a regular hacky sack. The sole is very round in shape and soft, almost as if it is a regular Western-style hacky sack, but it has five or nine feathers of different colors on top. Chinese hacky sack kicking is becoming a very popular sport in the USA, and it's spreading like wildfire in some middle and high schools,” Owner Qi Liu of Magnolia Trading Company told TDmonthly. Launch date: March 2007.