Whilst I totally agree with the suggestions of Children's Charities. Could just some contribution go to the very worthy RNLI Royal National Lifeboat Institution. They are a registered charity and receive no government funding and no lottery grants. Yet who can say how many lives the brave men & women have (and will) save.
To quote their web site
http://www.rnli.org.uk/Home.asp
"Our volunteer crews are funded almost entirely by voluntary donations and we provide a 24-hour service around the coast of the UK and Republic of Ireland."