Put in the missing words. Use: can, run around, small, thought, from, swim, several. Do you know what zorbing is? - It is unusual kind of sport.

Do you know what zorbing is? - It is unusual kind of sport.
In 1970, special balls were made for hamsters. Pet owners use them to project their small pets. In these balls pets can run around the flat without danger of being lost of injured.
In 1990, two yung guys from New Zealand thought that it would be very funny to make such balls for people! And they made it from plastic. Now there are several kinds of zorbing. You can run down a hill, run inside the ball during winter or summer. You even can swim in a zorb!
It's a lot of fun but you always should listen to the instructor attentively!