I have become interested in Charity Knitting lately too. For some ideas you could look for the book Knitting for Peace- it profiles many good charities and includes patterns, most of which are pretty simple. Many charities are American based, but many also include other countries.
For blankets specifically there is www.projectlinus.org/index.shtml
This is to make Security blankets for kids in crisis. The founder actually got permission from Charles Schultz to call it Project Linus.
When you go to their page, click under states and at the bottom is a link to a Canadian chapter- or you can start your own local chapter. The site gives the details. Linus blankets can be knitted, crochet, or sewn quilts.
Good luck! I hope this turns into a good project for you and your daughter.