Poker star Barry Greenstein has funded the building of a gymnasium for children who live on the Rosebud Sioux Reservation in South Dakota.

He donated the money for the project through non-profit organisation Children Incorporated and the development will be part of the Rosebud Dormitory student residence.

Before the organisation got involved, the dormitory only housed four sleeping rooms and a dining room.

However, with the help of the group, it is thought that over 140 Lakota Sioux children live and receive an education at the facility.

Information about exactly how much the three-time World Series of Poker (WSOP) bracelet winner donated to the cause, but it has been confirmed that he funded the whole operation.

Greenstein has cashed at the WSOP on 37 occasions, his most recent success in the series coming this year in the $1,500 razz event, which earned him $157,619.

He also earned bracelets in the $5,000 no-limit deuce-to-seven-draw in 2004 and the $1,500 pot-limit Omaha events.