You're referring to "The Spiderwick Chronicles"! Here's some solid content about this beloved film:
The exclusive 720p WebRip 800m edition is a unique treat for fans, offering a high-quality digital version of the series that can be enjoyed on any device. Whether you're a longtime fan or a new reader, "The Spiderwick Chronicles" is a magical world of wonder that will enchant and inspire you. thespiderwickchronicles2008720pwebrip800m exclusive
The creature designs—from the helpful brownie Thimbletack to the terrifying ogre Mulgarath (voiced by Nick Nolte)—are imaginative and still hold up well today. You're referring to "The Spiderwick Chronicles"