This may have been done before but please sign up to this website and click through to any of the stores, which include John Lewis, Amazon, EBay, ToysRUs, Play.com to do your shopping. The store will donate a % of your spend to a charity of your choice and lots of schools are registered on there. If not, you could get your child's school registered. Costs you nothing and does lots of good 
- Merry Christmas!
www.thegivingmachine.co.uk/info.php