In answer to your earlier questions, Lisa, the nearest town with all facilities is King's Lynn, which is about 7 miles. Hunstanton is about the same distance in the other direction, with all the tacky seaside entertainments that teenager seem to like! There certainly isn't much on the doorstep that a teenager (or even an adult) could do in an evening without transport, but for days out, there are plenty of options, depending upon the sorts of things your family enjoys!
The dog incidents that Ann mentions sound worrying, but I am fairly sure it must have been just a bad patch. We have been to Sandringham C&CC site many times, with and without a dog, and have always found it a delightful spot, with never a hint of trouble.