Seems a cheap double pack for the kids at £1.70 each film.
The Spiderwick Chronicles: Upon moving into the run-down Spiderwick Estate with their mother, twin brothers Jared and Simon Grace, along with their sister Mallory, discover a guide to an alternate magical world in their great-uncle's dilapidated house. They soon find themselves pulled into an alternate world full of fairies and other creatures...
Charlotte's Webb: Wilbur the pig is scared of the end of the season, because he knows that come that time, he will end up on the dinner table. He hatches a plan with Charlotte, a spider that lives in his pen, to ensure that this will never happen.