I don't know if these ideas will bring in quick-quick cash, but might help.
Ask neighbors/friends/family if you can mow their lawns or help with other household chores. Get together with family/friends to have a garage sale.
Have a plant sale - If you're into gardening and have fruits, veggies or other plants that you can split.
Offer to walk dogs or babysit.
If you have a talent of making jewelry, painting, sewing clothes for real people doll or both, crocheting/knitting, maybe look into selling your crafts online.