The scarab beetle is a small model with a secret compartment which is accessed by pulling back a "drawer" and opening up the beetle's wing case. The box is locked by closing the wing case and pushing the drawer back into place. This model is styled after the "Egyptian Revival" of the 19th and early 20th centuries rather than Ancient Egypt. For more information, visit this excellent page
It is worth researching this style as it is beautiful and striking. To the ancient Egyptians, the scarab beetle was symbolic of the sun (Ra) moving across the sky every day (the beetle rolling a ball of dung was seen to represent this). My model has a stylized beetle with a winged Ra between his two front feet. The model consists of 12 parts which must be fitted together. All pieces print without support. It also has my design logo on the bottom of it:-)
The assembly instructions are here: http://www.instructables.com/id/The-Scarab-Beetle-Box-Assembly-Instructions/ Please read these instructions as they will contain any updates I have had to make and instructions for modified files.