These include a 10-pound pool brick, a junior sized NFL-style football, and a junior sized basketball, all with negative buoyancy.
Association football | association football | football (soccer) | National Football League | American football | Forward (association football) | college football | Goalkeeper (association football) | Defender (association football) | Football (soccer) | Football in Italy | England national football team | Australian Football League | Australian rules football | Argentina national football team | Canadian Football League | Mexico national football team | Brazil national football team | Arena Football League | the Football League | Football in England | Football League First Division | Italy national football team | Scotland national football team | Germany national football team | Wales national football team | Spain national football team | France national football team | Football League Second Division | Defender (football) |