|  | 21. | I would paddle inner tubes to these islands 50 yards off the beach. 
 
 | 
|  | 22. | These guns were made from old inner tubes and scrap lumber. 
 
 | 
|  | 23. | Others played volleyball in waist-deep water or floated on inner tubes. 
 
 | 
|  | 24. | Bricks with the familiar fastening agents called inner tubes were created in 1958. 
 
 | 
|  | 25. | He'd clung to an inner tube for more than a day. 
 
 | 
|  | 26. | It features an extra inner tube palette to provide additional stability. 
 
 | 
|  | 27. | Playing pieces are inner tubes shaped like the components of the FIRST logo. 
 
 | 
|  | 28. | Three inner tubes were put on board as life preservers for 14 people. 
 
 | 
|  | 29. | The repair of inner tubes may be necessary on the road. 
 
 | 
|  | 30. | They used an improvised ball made from the inner tube of a tyre. 
 
 |