I've set up a JustTextGiving facility for my fundraising in the UK.
You can now donate using your mobile phone. It is quick and easy and (aside from the donation) won't cost you, me or Unicef anything. Just text the message PATA50 £5 including the amount you want to donate (£5 is shown as an example, but will work from £1) to 70070, and you'll get a receipt and the option to link to Gift Aid (which I recommend if you are a UK tax payer). Simples.
Please take a second to help Unicef give support to those kids. Thanks.