Simple indoor game
Benches/chairs/tape to divide playing area
Divide the playing area into 2 halves and then create within each half near the back another smaller 'bin' area
Divide into two teams each taking half of the playing area, but not in the bin area. Using 1 or more soft balls shared equally between both teams, balls are thrown to hit opposing team members below the knee. When players are hit they retire to the bin area behind the opponents line. From this position they can continue to attack the opposite team. Winners are the first team to knock all the opposing team into the bin area.