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!
Cute and cuddly to evil! Don't feed them after midnight!
1) Keep it away from bright light, 2) Don't get any water on it, and 3) Never, never ever feed it after midnight. Gremlins by Like a Monkey Art