What charities can an Ontario high school fund raise for?

I attend a high school in Ontario and I am interested in holding fundraising activities at my school to raise money for charity, does anyone have any ideas on what charity we could raise money for? I would like the charity we fundraise for to be something the students at my school will be motivated to fundraise for. I will run things such as draws, sell candy, etc. Any other fundraising ideas would also help. Thanks :)