How do an animation for child objects

Questions & Answers
1

I want create an animation to open a simple rotating door and I know how I can do it, but I want to create an animation where the door rotates 90 degrees and its handle (child object of the door) rotates 30 degrees: the animation door is correct but when the handle rotates its size changes and I don’t know why.

This photo represents the handle when the animation is not started:
alt text

This one represents the handle after the rotation, look the deformation:
alt text

Please, can you tell me what can I do?

2

I solved it: I have to scale and rotate the handle to the same values of the door. Now the handle rotates very well.
Anyway thanks Bryckout!