The outside of the mail pack includes the message "We need you to open this". The letter inside includes three case studies of children who have been helped by the NSPCC and asks for donations of £2 a month. The campaign was created by agency WWAV Rapp Collins London.
Marcus Missen, development director at the NSPCC, said: "We want to encourage recipients to make this pledge of support their own."
Cancer Research UK is hoping to raise £100,000 from its third annual Sound & Vision music and photography exhibition and auction at Abbey Road Studios in London on 28 February. Tickets are £100 each for the event, which will feature performances from Beverley Knight, 10cc and the Brand New Heavies.
The Variety Club Children's Charity is hosting its 17th Gold Heart day on 14 February to raise money for disadvantaged, sick and disabled children. Gold heart badges will go on sale at £1 each. The event has raised £30m to date.
The Cystic Fibrosis Trust has partnered with Samsung Mobile to run fundraising campaigns and activities throughout 2008. Events include a celebrity Samsung gala dinner and charity auction and Battersea Park fun run. The vice-president of Samsung Mobile UK and Ireland will also run the Flora London Marathon on behalf of the charity.