This is an example of how parents are getting involved in the online world in a positive way. The results are not entirely unexpected because of the value of the Narnia brand after the success of first 2 movies. The CS Lewis estate is doing what it is meant to do in term of protecting the intellectual property. They along with Disney who released the movies own the narnia.com domain and now they are after a lesser know or less valuable domain: narnia.mobi which these parents bought their son.
Anyway you can read the full details on the Telegraph or read this blog post that tells it like it is about how stupid the CS Lewis estate was in ignoring the narnia.mobi domain until now.