Homemade Spy box
First take a shoebox that you will want to build on. Make sure you can open and close it easily.
Build the Circuit
Connect the power to the servo. The servo should have the mechanical arm on it.
Put circuit into the box.
Make sure that when you switch the power on the mechanical arm will hit the top of the lid and make it open.
Hole for power
Make a hole or use existing hole to reach your power switch.
Customize with stickers and conveniences like I added a flap to change out batteries easily.