This is quite a difficult project, but thats only because everything is so small . I myself have very little experience and thats why the finished product isn't exactly what i expected.
Just follow the pictures and you'll be fine.
For those of of you who havent watched the Illusionist, here is the clip showing the locket in action:
Ok, let's get started !
A couple of things you'll need:
-Tools and machinery
-A drill press
-Wood ( duh )
-And finally Patience (you're going to need a lot of it , if you're a beginner like me :) )
Step 1: The plan
I made a 3d model so that its easier for all of you.
Take a good look at this picture it shows the left half of the heart, then proceed to the next step.