In crono crusade there is a time piece that is used by sister Rosette to give her life force to crono.
My prop for this is balsa wood and a didital photo keychain cost of equipment:
1)photo keychain $9.99 - $24.99 try to get this on sale
2)One blockstrip of 1/2 X 3 balsa wood $9.99 need to have enough to make 1" X 3"
the rest is sand paper, wire coat hanger, Paint, powered sander like a dremal
this is a detail pic of the watch:
If you want the sides to pop out like it showes i would use springs from a ballpoint pens and
a post guide to slide along since i am useing a photo frame i dont have the space to do that.