Does this baby-sitting flier sound good? What should I add? What should I take off?

Too much information - as for supplying snacks - that is not your responsibility unless you are opening a day care center in your own home. I am pretty sure your parents do not need the liability of having someones child in their home. You can offer your services to interested parents THAT YOU KNOW or have been referred to you. Do not give this kind of information to complete strangers and if this is your real contact information it has NO place here on a public forum. You gotta be a lot more aware of your own safety.