How to get extra lets say extra school money ?

My sister let me use her YA ! account . Okay so i'm 10 years old and me and my friends had a sleepover party a few days ago. And we discussed about why people abuse animals and why we kill animals .. So bal bla bla then we decided to save our money and donate it to the Local SPCA or RSPCA for some countries . We will be volunteering there too . I was wondering what can i do to get extra money ? I have a weekly allowance of 10 bucks so i keep 9 of those 10 bucks . So any ideas?