GREMLINS (1984) -- I watched this (little bit dated) movie with my kids and appreciated the funny-scary (may be a little bit scary to younger kids) plot and scenes -- and of course the cute little Gizmo! I especially enjoyed the concept -- a "pet" is purchased as a Christmas gift from an exotic, out-of-the-way pet shop. It comes with special instructions but what happens when those instructions are not followed to the letter? Fun!
If you read Roald Dahl's book, then you'll notice Tim Burton has almost lifted every scene and line verbatim from the pages to make this incredible movie. Yes, I love the Gene Wilder version as well. But as for staying true to the story, this film wins outright.