How to make money really fast?

im 13 and i need to go spring shopping REALLY bad. i went on the abercrombie website and picked out everything i wanted, a pair of shorts, sweatpants, a skirt, and pj bottoms. the total came out to 71.20 and i need money to give my mom for it...i babysit my sister (11) and cousin (3) but i never get paid...im too shy to ask my aunt to pay me because i know it wont be much and she would just get mad. any other ways i can make money fast? i dont mean stupid things like stealing or lemonade stands, i mean jobs that i can do around the house or neighborhood, but im extremely shy so i dont know what to do! please help? thanks in advance(: