How can an 11 year old get 20 in one week?

How can an 11 year old get 20 in one week?
Here are some ideas just perfect for an 11 year old:
Make paper flyers to advertise "Weed Pulling Services - $5.00 per bag". Pass them out in your neighborhood. Make sure to include a phone number and your first name only. Use the plastic Walmart bags to put weeds into (make sure to pull from the roots!), and for each bag you fill, you earn $5.Look around your room for toys and things that you no longer want. Sell them at a garage sale / sidewalk sale. Ask other family members for donations to come up with more items to sell. Sell lemonade or cool-aid at the garage sale, too!Sell "After School Play Time" using flyers (like in #1). Parents with children age 5 to 8 will hire you to come over after school to play with their kids so the parents can get things done (like cooking dinner, etc.) Charge $10 per child for 1 hour of playtime, or $15 per hour for 2 kids. Dog Walking Services. Again, make flyers to advertise your services. Agree to walk 1 dog each day, Monday through Friday, in the evening, around 5:30 p.m. for $25 per week. Walk should be about 15 minutes long.