Visible crew/equipment: At the beginning when Chuckie is turning on all the toys in the office, he flies a helicopter and the string is so visible its funny. The helicopter then crashes and you can still see it. In the next shot the man looks at it and there is no string.
Continuity mistake: When Andy finds Whitehurst bound and gagged in the closet Andy removes the piece of clothing used to gag Whitehurst mouth. When it cuts to Whitehurst getting up the cloth is tied back around his neck.
Trivia: Chucky always loses his right hand before he dies. Here's the proof: in Child's Play, Andy's mom shoots it off. In Child's Play 2, Chucky tears it off to escape from a bar. In Child's Play 3, Andy cuts it off with a knife.
Question: In Child's Play 1,2 and 3, we learn that Chucky bleeds once he is human, so why would not the cops notice blood on the ground or wherever Chucky met his demise, test the blood and verify that it belongs to Charles Lee Ray, hence confirming Andy's and his mother's story?