Stand your ground if the kids misbehave. Be firm with the kids. If they try to tell you that their parents let them do something that the parents specifically said not to do (like stay up past their bedtime), err on the side of caution and obey the parents’ rules. The parents will be impressed by your maturity and responsibility and hopefully invite you back!
It has universal appeal. Unlike some types of marketing that work better for certain segments than others, affiliate marketing is really something that anyone can use on their WordPress site or e-commerce store. With millions of products available and categories covering a wide spectrum, you’re bound to find more than enough products worth promoting.
Amazon has spent years perfecting the art of online selling and you’ll learn a lot about online marketing by observing how they do it. They constantly test different ways of promoting products and have evolved their site quite a lot over the years. See what widgets they use to promote related products, watch how they use reader reviews, and see the way that they describe products.