A question for people with children under 10 years old?
It's an idea for a "pet project" I'm thinking do during the holidays to earn some extra money. I am studying art at the moment, and my idea was to announce to paint / decorate the walls with their favorite cartoon children / Disney / cartoon characters / Action Man / Barbie, etc because to my knowledge, you can not buy things like this wallpaper without regard and posters. And, of course, a meeting with parents to decide what was going to the room / composition, etc., etc. 1. Would you be willing to get this done for your child? 2. How much you expect to pay for it [including materials]? Any other feedback / advice would be appreciated. 
As you know, I have no children but I have cousins younger, and this was a popular idea in recent years. I remember an aunt to get her friend to paint his daughters bedroom with these images of puppies very nice ~ tiger actually seen his work, and it was amazing. When she moved home, I did a little of this type of painting in a room with my younger cousin. As I said, can be a popular concept, although parents may be wary of what they choose children ~ tastes change as they grow so fast these days (although there is the potential for redecoration!). I think the cost really depends on the size of the wall to paint, and once you have paid for their materials, which basically establishing a labor cost per hour ~ perhaps a detail of any professional painter or decorator offering this service to see what the price is above average. One thing pans I know, with respect to the materials: The tester bit of paint are more affordable and go a long way surprising, especially if it's a color I do not think he using most.
