They like using the Internet. They have lots of pocket money to spend. And they spend a higher proportion of it online than the rest of us. Teenagers are just the sort of people an online seller is interested in, and the things they want to buy-games, CDs and clothing-are easily sold on the Web. But paying online is a tricky business for consumers who are too young to own credit cards. Most have to use a parent's card. They want a facility that allows them to spend money. That may come sooner than they think: new ways to take pocket money into cyber   space are coming out rapidly on both sides of the Atlantic. If successful, these products can stimulate online sales. In general, teenagers spend huge amounts: $153bn (billion) in the US last year and PS20bn annually in the UK. Most teenagers have access to the Internet at home or at school-88 percent in the US, 69 percent in the UK. According to the Jupiter Research, one in eight of those with Internet access has bought something online-mainly CDs and books. In most cases, parents pay for these purchases with credit cards, an arrangement that is often unsatisfactory for them and their children. Pressing parents to spend online is less productive than pressing on the high street. They are more likely to ask "Why?" if you ask to spend some money online. One way to help teenagers change notes and coins into cybercash is through prepaid cards such as InternetCash in the US and Smart cards in the UK. Similar to those for pay-as-you-go mobile telephones, they are sold in amounts such asPS20 or $50 with a concealed 14-digit number that can be used to load the cash into an online account. New way to help teenagers shop online is to use   _  .
a new machine special coins and notes prepaid cards pay-as-you-go mobile phones